Gotowe bibliografie tematyczne / Alfisol

Gotowa bibliografia na temat „Alfisol”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 19 lutego 2023

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Artykuły w czasopismach na temat "Alfisol"

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Oades, JM, i AG Waters. "Aggregate hierarchy in soils". Soil Research 29, nr 6 (1991): 815. http://dx.doi.org/10.1071/sr9910815.

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An Alfisol, a Mollisol and an Oxisol were fractionated into different particle sizes after a range of disaggregating treatments from gentle to vigorous. The Alfisol and the Mollisol appeared to break down in steps; macroaggregates >250 �m diameter breaking down to microaggregates 20-250 �m diameter before particles <20 �m were released. Vigorous disruption led to particle size distributions similar to those obtained by classical methods used to determine particle size distributions. The Oxisol was stable to rapid wetting treatments but when aggregate disruption was initiated by vigorous treatments particles <20 �m diameter were released and there was no evidence of aggregate hierarchy. Scanning electron microscopy of particles of different sizes showed distinctly single grain particles and aggregates. The microscopic studies indicated the potential role of roots and hyphae in the stabilization of larger aggregates, and for fragments of roots as nuclei for smaller aggregates. Plant debris was not visible in aggregates <20 �m but clay microstructure was evident. It is suggested that aggregate hierarchy occurs in Alfisols and Mollisols because organic materials are the dominant stabilizing agents in larger aggregates but in the Oxisol oxides are dominant stabilizing agents and prevent the expression of aggregate hierarchy caused by organic materials.
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2

Odiamehi Onokebhagbe, Victor, Kingsley Chinyere Uzoma, Lawal Mubarak, Auwalu Abubakar Kwalam i Habib Dahiru Wakili. "Effects of Poultry Biochar on Electrochemical Properties of an Alfisol and Vertisol of Northern Nigeria". Indonesian Journal of Innovation and Applied Sciences (IJIAS) 1, nr 3 (26.10.2021): 200–207. http://dx.doi.org/10.47540/ijias.v1i3.288.

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This study was aimed to know the effects of biochar on charge properties of an Alfisol and Vertisol of semi-arid soils of Northern Nigeria. A laboratory experiment was conducted to determine the effects of biochar on point zero charge of soils. Experiment was laid out in a complete randomized design and consisted of two factors; 2 soil types and biochar at 4 levels giving a total of 8 treatment combinations with 3 replications each.The results obtained from the study showed that the pH in KCl of the incubated soils ranged from 7.3 to 7.4 and 7.6 to 7.9 for the Alfisol and Vertisol; 7.5 to 7.7 and 7.9 to 8.3 pH in H2O, was obtained for the Alfisol and Vertisol respectively. Electrical conductivity obtained ranged from 3.22 to 4.72 and 2.88 to 4.21 dS m-1 for Alfisol and Vertisol respectively. Electrical potentials ranged from -19.70 to -35 and -31.45 to -63.04 for the Alfisol and Vertisol respectively. The Point Zero Charge of soils correlated positively with the properties of the soils and the biochar rates.The addition of biochar to soils modified the PZC, increased the pH, electrical conductivity (ECe) and cation exchange capacity (CEC) of the soils.
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3

Ahmed, Nayan, Chandrika Varadachari i Kunal Ghosh. "Soil clay–humus complexes. I. Alkali dissolution, TEM, and XRD studies". Soil Research 40, nr 4 (2002): 691. http://dx.doi.org/10.1071/sr01045.

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Clay-humus complexes from 5 different soils (Entisol, Alfisol, Vertisol, and 2 Mollisols) were isolated by aqueous dispersion. Humic acid (HA) extractable from the complexes by alkali solutions ranging from pH 8 to 14, before and after acid pretreatment, were studied. Extraction by alkali solutions alone was not very effective except with the Alfisol sample. However, pretreatment by acid greatly increased extractability in all samples except the Alfisol. Maximum extraction of HA occurred at pH 12. In the Alfisol sample, clay-HA linkage is probably through hydrogen or other monovalent cation bridges which can be broken by alkali treatment. In Entisol and Mollisol II samples, cation bridging by higher valent, acid-extractable cations is dominant; both these modes are evidenced in the Mollisol I sample. The Vertisol sample has the strongest clay-HA links. TEM studies revealed a reduction in size of the montmorillonite particles in the Vertisol clay-humus complex (compared with humus-free clay); destacking and dispersion of montmorillonite occurred on HA complexation as observed previously for in vitro systems. Relative intensity of the 15� XRD line was much weaker in the Vertisol clay-humus complex than in the clay, lending further support to the fact that that c-stacking is disrupted during complexation of smectite with humus.
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Rahayu, Rahayu, Komariah Komariah i Mei Pujiyarti. "Effect of Pottery Irrigation and Mulching on Melon (Cucumis melo) Growth and Soil Properties of Alfisol and Entisol". JOURNAL OF TROPICAL SOILS 27, nr 3 (13.07.2022): 99. http://dx.doi.org/10.5400/jts.2022.v27i3.99-109.

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The water supply in dry land depends on the rainfall, which causes agricultural constraints and limited water supply. The pottery irrigation method is considered capable of overcoming water shortages during the dry season. Pottery irrigation uses porous clay, so the water slowly comes out of the pottery and wet the surrounding soil. The research aimed to study the influence of pottery subsurface irrigation with and without mulching on watermelon growth and soil properties of clayey soil Alfisol and sandy soil entisol. The research was conducted on July 2019 in the experimental field Faculty of Agriculture, Karanganyar Regency. The experimental research design used a nested design with a 3-factor treatment that were soil type (T), fertilization method (P), and use of mulch (M). The types of soil were Alfisol (T1) and Entisol (T2). The fertilization methods were fertigation 100% (P1), fertigation 50% (P2), and banding fertilization 100% (P3). Mulch application included control, without mulch (M0) and mulch (M1). The combination of P1M1 treatment on alfisol and entisol soil showed the highest soil moisture with values of 23.1% and 22.5%, respectively. The highest fruit weight of melon in alfisol and entisol soils were indicated by the same treatment (P1M1) with values of 580.33 g and 616.5 g, respectively.
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Fasth, William J., Mark B. David i George F. Vance. "Sulfate retention and cation leaching of forest soils in response to acid additions". Canadian Journal of Forest Research 21, nr 1 (1.01.1991): 32–41. http://dx.doi.org/10.1139/x91-005.

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A vacuum extractor was used to examine the effects of increased SO42− deposition on net S retention and cation leaching in three Maine Spodosols (Berkshire, Dixfield, and Rawsonville series) and an Illinois Alfisol. Columns (leached daily for 30 days with either a simulated throughfall solution containing 80 μequiv. SO42−•L−1 (pH = 4.77) or a simulated throughfall solution plus 200 μequiv. H2SO4•L−1 (pH = 3.66)) were constructed using O horizons over upper B (Bh or Bhs) and lower B (Bhs or BC) horizons for the Spodosols and two depth increments of bulked soil (0–12 and 12–25 cm) for the Alfisol. Leachate concentrations of base cations were dominated by Ca2+ and were generally greater in the Alfisol than in the Spodosol leachates. Declining concentrations of base cations and NH4+ with time led to an increase in Al3+ concentrations and a decrease in pH for some of the Spodosol leachates (e.g., leachate Al3+ increased from 19 μequiv. Al3+ •L−1 (day 2) to 194 μtequiv. Al3+ •L−1 (day 30), and pH decreased from 5.53 to 4.41, respectively, for the Dixfield high-S treatment). Columns that received the high-S treatment retained a greater percentage of the added S than those that received the low-S treatment because of increased SO42− adsorption in the former. High rates of net organic S mineralization were found for all soil types (e.g., 169 μg organic S•g−1 over 30 days for the Rawsonville Bhl horizon, 15% of the total S); no treatment effects were found for the amount of S mineralized. Trends in net S retention across soil type (within the same treatment) reflected increases in soil SO42− from adsorption, as well as decreases in organic S from mineralization. When net S mineralization was removed from leaching losses of S, trends in net S retention closely reflected SO42− adsorption differences (50, 23, 8, and 1% of the added S retained by the Rawsonville, Dixfield, and Berkshire series, and the Alfisol, respectively, for the high-S treatment). Because of the low SO42− adsorption capacity of the Alfisol relative to the Spodosols, organic processes were more important in affecting net S retention for the Alfisol. Inorganic processes of S retention were more important for the three Spodosols studied.
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Ahmad, Ayaz, Shahzada Sohail Ijaz i Zhenli He. "Effects of Zeolitic Urea on Nitrogen Leaching (NH4-N and NO3-N) and Volatilization (NH3) in Spodosols and Alfisols". Water 13, nr 14 (12.07.2021): 1921. http://dx.doi.org/10.3390/w13141921.

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Global use of urea nitrogen (N) fertilizer is increasing, but N losses are still very high (40–70%). Zeolites have the capability of holding NH4+, thus reducing N losses when applied as a soil amendment. However, application of a large quantity of zeolite is costly and inconvenient. In this study, zeolitic fertilizers were evaluated to select the best formulation with reduced leaching of NH4-N and NO3-N and NH3 volatilization in agricultural soils (Alfisol and Spodosol). The treatments included the following: T0 = control, T1 = urea fertilizer, T2 = zeo-urea (1:1), T3 = zeo-urea (2:1), T4 = zeo-urea (3:1), T5 = zeo-urea (1:2), and T6 = zeo-urea (1:3). Leaching was performed at 4, 8, 12, 19, 25, 32, 39 and 45 days after the soils were treated with the designated fertilizers, including control, and packed into columns. Leachate samples were collected after each leaching event and analyzed for the concentrations of NH4-N and NO3-N and the quantity of leachate. Ammonia volatilization was recorded at days 1, 5, 9, 13 and 20 of soil treatments. Results indicate that zeolitic fertilizer formulations effectively reduced N losses. NH4-N loss was reduced by 13% and 28% by zeo-urea (1:1) in Alfisol and Spodosol soils, respectively, whereas zeo-urea (2:1) and zeo-urea (3:1) effectively decreased NO3-N leaching in Alfisol. Volatilization loss of NH3 was reduced by 47% in Spodosol and 32% in Alfisol soil with zeo-urea (1:1) as compared with that of urea fertilizer. The results suggest that zeo-urea (1:1) is an effective fertilizer formulation for reducing N losses, especially in Alfisol, as compared with conventional urea fertilizer.
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Rashmi, I., AK Biswas, VRR Parama i AS Rao. "Phosphorus sorption characteristics of some representative soils of south India". SAARC Journal of Agriculture 13, nr 1 (15.07.2015): 14–26. http://dx.doi.org/10.3329/sja.v13i1.24176.

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Studies were conducted to investigate P sorption characteristics of representative soils from ten locations of alfisol and ultisol of India using Langmuir and Freundlich equations. The P sorption maxima (b) of soils derived from Langmuir equation in alfisol varied from 520.6 to 574.7 ?g g-1 and ultisol varied from 561.6 to 678.1 ?g g-1. The maximum phosphorus buffering capacity (MPBC) in alfisol ranged from 80.7 to 180.2 ml ?g-1 and ultisol ranged from 162.1 to 284.4 ml ?g-1. Phosphorus sorption maxima was significantly correlated with clay (r2=0.70), Al (r2= 0.73) and Fe (r2=0.81) forms, MPBC (r2=0.67) and Freundlich constants (r2=0.82). The standard P requirement (SPR) to maintain 0.2 mg l-1 P in soil solution for alfisol ranged from 15.62 to 27.62 mg kg-1 and ultisol from 41.98 to 46.35 mg kg-1. The SPR (0.2 mg l-1) was significantly correlated with binding strength coefficient (r2= 0.97) and binding strength coefficient supporting the fact that energy coefficient of a soil is an important index for planning P management strategies. Among the two soil orders in order to maintain optimum P concentration in soil solution for crop growth, ultisol will be required to supply with more P fertilizer as compared to alfisol.SAARC J. Agri., 13(1): 14-26 (2015)
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Ahmed, Nayan, Chandrika Varadachari i Kunal Ghosh. "Soil clay–humus complexes. II. Bridging cations and DTA studies". Soil Research 40, nr 4 (2002): 705. http://dx.doi.org/10.1071/sr01046.

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Clay-humus complexes, isolated from 5 soils (Entisol, Alfisol, Vertisol, two Mollisols), were extracted with 0.1 n citrate, EDTA, and oxalate at pH 7.0-10.0; amounts of Ca2+, Mg2+, Fe3+/2+, Al3+, as well as humic acid (HA) in the extract were determined. HA extracted increased with pH and varied with nature of ligand; largest amounts were extracted by EDTA at high pH. In the Entisol clay-humus extract, Ca2+ is dominant. In Alfisol sample, Ca2+ and Mg2+ have little role in clay-HA bonding; apart from monovalent cations, bonding is mainly through Fe3+/2+ and Al3+, which are well correlated to HA extracted. The extract from Vertisol sample contains little Fe3+/2+ or Al3+ and major bonding is through Ca2+. In Mollisol I and II, Ca2+, Mg2+, Fe3+/2+, and Al3+ are all involved in bonding and are highly correlated to extracted HA. Difference in mineralogy determines the difference in bonding strength between Alfisol and Vertisol complexes. DTA indicates dual bonding modes. A major fraction of HA (in clay-humus complexes) shows thermal destabilisation due to multiple attachments on the clay surface; a small fraction is also thermally stabilised by ionic bonding with Ca2+/Mg2+ and absence of ring strain in the complex. Only the Alfisol HA does not show thermal stabilisation in the complex.
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Rabbi, Sheikh M. Fazle, Quan Hua, Heiko Daniel, Peter V. Lockwood, Brian R. Wilson i Iain M. Young. "Mean Residence Time of Soil Organic Carbon in Aggregates Under Contrasting Land Uses Based on Radiocarbon Measurements". Radiocarbon 55, nr 1 (2013): 127–39. http://dx.doi.org/10.2458/azu_js_rc.v55i1.16179.

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Radiocarbon is a useful tool for studying carbon dynamics in soil aggregates. The objective of the current study was to determine the mean residence time (MRT) of soil organic carbon (SOC) in macroaggregates and microaggregates under contrasting land uses. Contrasting land uses investigated at Alfisol (equivalent to Dermosol in Australian Soil Classification) sites were native pasture (NP), crop-pasture rotation (CP), and Eucalypt woodland (WL), whereas in Oxisol (Ferrosol in Australian Soil Classification) sites, land uses comprised improved pasture (IP), cropping (CR), and forest (FR). Soil aggregates were separated into macroaggregates (250–2000 μm) and microaggregates (53–250 μm) by wet-sieving, and their14C signatures were determined by accelerator mass spectrometry (AMS). The14C activity in both macro- and microaggregates was >100 pMC, indicating the presence of post-bomb carbon in the soil. The mean residence time (MRT) of SOC in macro- and microaggregates (MRTagg) was on average 68 yr longer in the Oxisol compared with that in the Alfisol. The MRTaggin microaggregates was 10 yr longer than that of macroaggregates in the Alfisol. However, the MRTaggin microaggregates was 50 yr shorter compared to macroaggregates in the Oxisol.The MRT of macro- and microaggregates can be separated into active, slow, and stable SOC pools. Among the 3 SOC pools, the MRT of the stable pool is of higher significance in terms of SOC stabilization in soil aggregates because of its longer MRT. However, isolation and direct MRT estimation of the stable SOC pool is difficult. The MRT of active and slow SOC pools associated with macro- and microaggregates was measured using a SOC mineralization experiment to estimate the MRT of the stable SOC pool under contrasting land uses by applying a mass balance criterion. The MRT of active (MRTA) and slow (MRTS) SOC pools in macro- and microaggregates varied between 1–50 days and 13–38 yr, respectively. The estimated MRT of the stable pool carbon (MRTP) in microaggregates was 897 yr longer compared to that of macroaggregates in the Alfisol. However, in the Oxisol, MRTPin microaggregates was 568 yr shorter than that of macroaggregates. Among the land uses, WL in Alfisol and CR in Oxisol had longer MRTaggand MRTPcompared to other land uses.
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Rabbi, Sheikh M. Fazle, Quan Hua, Heiko Daniel, Peter V. Lockwood, Brian R. Wilson i Iain M. Young. "Mean Residence Time of Soil Organic Carbon in Aggregates Under Contrasting Land Uses Based on Radiocarbon Measurements". Radiocarbon 55, nr 01 (2013): 127–39. http://dx.doi.org/10.1017/s0033822200047858.

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Radiocarbon is a useful tool for studying carbon dynamics in soil aggregates. The objective of the current study was to determine the mean residence time (MRT) of soil organic carbon (SOC) in macroaggregates and microaggregates under contrasting land uses. Contrasting land uses investigated at Alfisol (equivalent to Dermosol in Australian Soil Classification) sites were native pasture (NP), crop-pasture rotation (CP), and Eucalypt woodland (WL), whereas in Oxisol (Ferrosol in Australian Soil Classification) sites, land uses comprised improved pasture (IP), cropping (CR), and forest (FR). Soil aggregates were separated into macroaggregates (250–2000 μm) and microaggregates (53–250 μm) by wet-sieving, and their14C signatures were determined by accelerator mass spectrometry (AMS). The14C activity in both macro- and microaggregates was &gt;100 pMC, indicating the presence of post-bomb carbon in the soil. The mean residence time (MRT) of SOC in macro- and microaggregates (MRTagg) was on average 68 yr longer in the Oxisol compared with that in the Alfisol. The MRTaggin microaggregates was 10 yr longer than that of macroaggregates in the Alfisol. However, the MRTaggin microaggregates was 50 yr shorter compared to macroaggregates in the Oxisol.The MRT of macro- and microaggregates can be separated into active, slow, and stable SOC pools. Among the 3 SOC pools, the MRT of the stable pool is of higher significance in terms of SOC stabilization in soil aggregates because of its longer MRT. However, isolation and direct MRT estimation of the stable SOC pool is difficult. The MRT of active and slow SOC pools associated with macro- and microaggregates was measured using a SOC mineralization experiment to estimate the MRT of the stable SOC pool under contrasting land uses by applying a mass balance criterion. The MRT of active (MRTA) and slow (MRTS) SOC pools in macro- and microaggregates varied between 1–50 days and 13–38 yr, respectively. The estimated MRT of the stable pool carbon (MRTP) in microaggregates was 897 yr longer compared to that of macroaggregates in the Alfisol. However, in the Oxisol, MRTPin microaggregates was 568 yr shorter than that of macroaggregates. Among the land uses, WL in Alfisol and CR in Oxisol had longer MRTaggand MRTPcompared to other land uses.
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Rozprawy doktorskie na temat "Alfisol"

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SPARKS, NICOLE RENEE. "PHOSPHORUS SATURATION AS RELATED TO FERTILIZATION HISTORY OF AN OHIO ALFISOL". University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029527653.

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Bajracharya, Roshan Man. "Soil Crusting and Erosion Processes on an Alfisol in South- Central India /". The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487861396027536.

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Milne, Eleanor. "Soil conservation in relation to maize productivity on sub-tropical red soils in Yunnan Province, China". Thesis, University of Wolverhampton, 2001. http://hdl.handle.net/2436/93882.

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Agricultural land in China is being degraded, with soil erosion becoming an increasing problem. In Yunnan Province, south-west China, there is a long history of soil erosion due to soil type, climate, anthropogenic influence and because 95% of the Province is mountainous. Population pressure and lack of flat land necessitate cultivation of steep slopes. The Yunnan Government prohibits cultivation of slopes >25°, however policy enforcement would result in food shortages in the Province, due to a lack of suitable land <25°. Therefore, the most appropriate way to curb soil erosion in Yunnan is to devise affordable agronomic means of reducing soil loss, which do not decrease crop productivity on sloping land currently under cultivation. At present, very little research has addressed these issues. A research project, building on existing work from 1993-1996, was initiated in 1998. The aim was to test the hypothesis that contour cultivation and contour cultivation plus straw mulch decrease runoff and soil erosion rates on sloping land in Yunnan Province under maize cultivation and to assess the impact of these conservation measures on maize productivity and soil nutrient status. Thirty runoff plots, located on three different slope angles (I 3°, II 10° and III 27°), in three groups of 10, were used to examine three cropping treatments in a replicated plot design in 1998 and 1999. Treatments were downslope cultivation (control), contour cultivation and contour cultivation plus straw mulch. In addition, there was an unreplicated bare plot in each group. Runoff and soil loss were measured on a storm-by-storm basis. Soil nutrient status was measured at the beginning and end of each cropping season. Crop growth parameters and soil physical properties were measured throughout the cropping seasons (21/05–7/10 in 1998 and 22/05–2/10 in 1999). In 1998, seasonal rainfall was 1024 mm, ~28% greater than the 30-year mean. Soil loss was significantly reduced by contour cultivation on Slopes I and II. On Slope I, downslope cultivation produced 3.07 t ha-1 soil loss and contour cultivation reduced this by 81.4 %. On Slope II, downslope cultivation produced 19.11 t ha-1 and contour cultivation reduced this by 58.0%. The addition of straw mulch gave a further, nonsignificant, reduction on both slopes. On Slope III, downslope cultivation and contour cultivation produced 6.92 and 6.29 t ha-1 of soil loss, respectively, with contour cultivation plus straw mulch having 99.4% less erosion than downslope cultivation. In the much drier 1999 season, no treatment significantly reduced soil loss on Slope I. Contour cultivation significantly reduced soil loss on Slopes II and III. On Slope II, downslope and contour cultivation produced 11.52 t ha-1 of soil loss and contour cultivation reduced this by 85.8%. On Slope III, downslope and contour cultivation produced 8.62 and 0.23 t ha-1, respectively; a reduction of 97.3% by contour cultivation. The addition of straw mulch did not further decrease soil loss. Treatment effects on soil nutrient status varied between the two years. At the end of the 1998 season, there was significantly higher soil available N under contour cultivation plus straw mulch on all three slopes (Slopes I and II P <0.001, Slope III P <0.05), an effect that was not found in 1999. At the end of the 1999 season, soil available K was significantly (P <0.001) higher under contour cultivation plus straw mulch on Slope III. In both years, contour cultivation plus straw mulch significantly reduced soil temperature. However, this did not result in yield reductions in comparison with the control. There was an increase in soil moisture content under contour cultivation plus straw mulch during dry periods, which was particularly noticeable in 1999. In 1998, there were no significant treatment effects on grain or shoot yield. In 1999, on Slope II, contour cultivation plus straw mulch significantly increased grain yield by 50.3% compared with the downslope treatment (P <0.05). In 1999, contour cultivation plus straw mulch also significantly increased leaf plus stem yield on Slopes I and II by 12.4 and 36.8%, respectively. It is concluded that on ≤10° slopes, contour cultivation alone is a suitable soil conservation measure. However, use of straw mulch would benefit soil moisture and nutrient status and could, therefore, increase crop yield. On ≥27° slopes, it is recommended that contour cultivation plus straw mulch be used as a soil conservation measure to ensure maximum soil conservation, even in extreme rainfall conditions.
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Ann, Varughese Merrie. "Mulching and tillage effects on GHG emissions and properties of an Alfisol in Central Ohio". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1322596901.

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Xu, Zhihong, i n/a. "Nitrogen Cycling in Leucaena Alley Cropping". Griffith University. Division of Australian Environmental Studies, 1991. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050906.155955.

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Field experiments were conducted on an Alfisol in the semi-arid tropics of northern Australia to investigate nitrogen (N) cycling in the leucaena (Leucaena leucocephala) alley cropping system. This is a farming system in which maize (Zea mays L.) is grown in alleys formed by leucaena hedgerows spaced 4.5 metres apart. Mineralization of N from Ieucaena (prunings) and maize residues was studied under field conditions. Response of maize growth to addition of N fertilizer and plant residues was evaluated both in field plot and microplot experiments. The fate of fertilizer N and leucaena N was examined over four consecutive seasons. The decomposition (loss of mass) of dry, cut 15N-labelled leucaena residues differed from that of intact fresh leucaena prunings in the first cropping season although no difference was detected after one year. At the end of one cropping season, 3 months after application, 58-72% of 15N-labelled leucaena had decomposed compared to only 34-36% of fresh leucaena prunings. Similar trends occurred at 20 and 52 days after application. The extent of decomposition of fresh leucaena prunings (28-33%) was similar at two loading rates (2.4 and 4.7 t DM ha -1) by 3 months after addition. About 72% of young 15N labelled maize residues was decomposed by 3 months after addition in the presence of fresh leucaena prunings. Decomposition of 15N-labelled leucaena residues and unlabelled fresh prunings was 91% and 88% respectively 14 months after addition. After 2 years the corresponding values were 96% and 94%. When N content of the recovered residues was taken into account, the values were 95% and 94% after 14 months, and the same (97%) after 2 years. Maize yield and N uptake were significantly increased following addition of either unlabelled fresh leucaena residues or 15N-labelled thy Ieucaena residues. Application of N ferilizer produced a thither increase in the presence of the residues. The maize yield and N uptake with the 15N-labelled leucaena were not different from those with the unlabelled residues. There was a significant positive interaction between N fertilizer and leucaena prunings which increased maize production. Addition of maize residues decreased the yield and N uptake of maize compared with that obtained in the presence of N fertilizer at 40 kg N ha~1 and leucaena residues (2.4 t DM ha-1). There was a marked residual benefit of N fertilizer applied in the first season at 36 kgN hat in the presence of leucaena prunings on the second maize crop yield and N uptake, but not on the third crop. However, a significant residual benefit of leucaena prunings added in the first season was found in DM yield and N uptake of the second and third maize crop. The short-term fate of 15N applied in plant residues was examined during two separate cropping seasons. By 20 days after application of separate 15N-labelled leucaena leaves, stems and petioles, 3-9% of the added 15N could be found in maize plants, 33-49% was in surface residues, 36-48% in the 2 m soil proffle and 0.3-22% unaccounted for. In a separate experiment when leucaena components were not separated, 5% of 15N applied in leucaena residues was taken up by maize 52 days after addition, 45% was in residues, 25% was in soil and 25% was unaccounted for. Jn another experiment, maize recovered 6% of added leucaena 15N after 2 months, 39% remained in residues, 28% was in soil and 27% was not recovered. Incorporation of 15N-labelled leucaena residues in the soil did not increase recoveiy of leucaena 15N by maize compared with placement of the residues on the soil surface. By the end of one cropping season (3 months after application), 9% of added 15N was recovered by maize from 15N-labelled leucaena. There was a similar 15N recoveiy from 15N-labelled maize residues applied as mulch at 1.7 t DM ha1 together with unlabelled leucaena prunings at 2.4 t DM ha ~. In both cases, 30-32% of added 15N was detected in soil, 28% in residues, and 31-34% apparently lost. The short-term fate of fertilizer 15N was different from that of 15N added in plant residues. In a 52-day experiment, maize recovered 65-79% of fertilizer 15N applied at low rates (6.1 and 12.2 kg N ha -1) in the presence of leucaena prunings, 21-34% was present in soil, and less than 1% was not recovered. By 2 months after application, recoveiy of fertilizer 15N by maize was 41% from N fertilizer added at 80 kg N ha -1, 35% from N fertilizer at 40 kg N ha -1 in the presence of leucaena prunings, and 24% from N fertilizer at 40 kg N ha -1 in the presence of maize residues and leucaena prunings. The corresponding deficits (unaccounted-for 15N) were 37%, 38% and 47% respectively. A small but significant amount of the fertilizer 15N was present in the unlabelled leucaena residues (3%) and in the mixture of unlabelled leucaena and maize residues (7%) present on the soil surface. However, application of the plant residues did not affect recoveiy of the fertilizer 15N in soil (21-24%). When N fertilizer was applied at 40 kg N hi1 in the presence of leucaena prunings, 43% of fertilizer 15N was recovered by maize at the end of cropping season, 20% in soil, 2% in residues, and 35% unaccounted for. The long-term fate of fertilizer 15N was compared with that of leucaena 15N in an experiment over four cropping seasons. In the first season, maize tops recovered 50% of the fertilizer 15N but only 4% of the leucaena 15N. In the second, third and fourth seasons, maize (tops + roots) recovered 0.7%, 0.4% and 0.3% of the initial fertilizer 15N compared with 2.6%, 1.8% and 1.4% of the initial leucaena 15N. In the second, third and fourth seasons, recovery of the initial fertilizer 15N (12-14%) in soil was much lower than that of the initial leucaena 15N (38-40%). There was no further loss of the fertilizer 15N after the first season. However, the cumulative 15N deficit for the leucaena 1N in the first two seasons was 50%--thissuggested an additional loss of 23% since the end of the first season. There was no further loss of 15N from either residual fertilizer 15N or residual leucaena 15N in the third and fourth seasons. In conclusion, application of leucaena prunings could substantially increase maize yield and N uptake although some supplementary N fertilizer may be required to achieve maximum crop yield. Maize recovered only a small amount of added leucaena N in the first year. Most of the leucaena residue N was present in the soil and remaining residues after one season. This residue N would be gradually available for plant uptake by subsequent crops. Of course, annual additions of leucaena prunings would appreciably increase the pool of available N over time. Thus, application of leucaena prunings could substantially improve soil fertility in the long term.
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Cazetta, Disnei Amélio [UNESP]. "Épocas de aplicação do nitrogênio nas características agronômicas e na eficiência de uso na cultura do milho". Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/105133.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O N é o nutriente exigido em maior quantidade pela cultura do milho, influenciando nas características fenológicas, produtivas e na qualidade de grãos. Para avaliar a influência de épocas de aplicação do N sobre as características agronômicas e de eficiência de uso do nutriente na cultura do milho, o presente trabalho foi desenvolvido nos anos agrícolas 2006/2007 e 2007/2008, em dois ambientes de produção (Jaboticabal – em solo do tipo Latossolo e Itápolis – em solo do tipo Argissolo) no sistema de plantio direto em consolidação, utilizando o delineamento experimental em blocos ao acaso, constituídos por vinte e dois tratamentos, com quatro repetições. Cada parcela foi representada por oito linhas com 6,0 m de comprimento, considerando-se como área útil as quatro linhas centrais, desprezando-se um metro em ambas as extremidades. Concluiu-se que as características agronômicas, nutricionais e de eficiência de uso do N são influenciadas pelas épocas de aplicação de N e pelo ambiente, porém a aplicação de 120 kg ha-1 nos estádios de V4-V5 é superior em relação as demais, proporcionando também maior eficiência agronômica de uso do N; em ambiente de produção de Itápolis, as maiores produtividades são decorrência da aplicação parcelada de N na semeadura, no estádio V4-V5 e V10-V12 (30-60-30), ou pela aplicação total de N no estádio V4-V5; em ambiente de produção de Jaboticabal, as maiores produtividades são promovidas pelo parcelamento do N, como também pela aplicação total do N na semeadura e no estádio V4-V5; a estimativa do teor de clorofila para diferenciar tratamentos de adubação nitrogenada deve ser feita no estádio V10-V11 do milho; o estudo de correlação é viável para o estudo da adubação nitrogenada no milho e serve como uma ferramenta para as demais observações
Nitrogen is the nutrient required in greatest quantity by the maize crop, influencing the phenological, yield and grain quality. To assess the influence of timing of N application on agronomic characteristics and use efficiency of nutrient use in maize, this work was developed in the years of 2006/2007 and 2007/2008, in two production environments (Jaboticabal - Oxisol soil type and Itápolis – Alfisol soil type) in no-tillage system in consolidation, using a randomized block design, consisting of twenty-two treatments with four replications. Each plot was represented by eight lines, with 6,0 m long, considering how useful the area four central lines, ignoring one meters at both ends. We conclude that the agronomic characteristics, nutritional and use efficiency of N are influenced by timing of N application and the environment, but the application of 120 kg ha-1 in stages V4-V5 is higher than in the other, also provide the highest agronomic use efficiency of N; in production environment Itápolis, the highest yields are due to split N application at sowing, at the stage V4-V5 and V10-V12 (30-60-30), or the total application of N at V4-V5 stage; in production environment Jaboticabal, the highest yields are promoted by splitting N, as well as the application of total N at sowing and at stage V4-V5, the estimation of chlorophyll content to differentiate fertilization treatments should be done in the V10-V11 stage of maize, the correlation study is feasible for the study of nitrogen fertilization in maize and serves as a tool for other observations
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Lacarce, Eva. "Evolution structurale, minéralogique et géochimique d'une séquence Vertisol - Alfisol : étude dans la zone de transition climatique du sud de l'Inde sur socle Archéen". Paris 6, 2006. http://www.theses.fr/2006PA066283.

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Dans la zone de transition climatique du sud de l'Inde, des Vertisols noirs et des Alfisols rouges sont associés au sein de petits bassins versants. Quels sont les déterminismes et les mécanismes à l'origine de leur différenciation ? La roche, ici un complexe métamorphique, mais aussi l'eau par les transports de particules ou de solutés et l'ambiance chimique qu'elle induit, peuvent être des facteurs clef. Pour répondre à cette question, une étude multi-scalaire des structures et des constituants du sol, depuis le bassin versant jusqu'au minéral, a été menée sur le bassin versant de Mule Hole. La chimie et la minéralogie des constituants ont été déterminées, finement pour les argiles et les oxydes de fer qui sont respectivement les principaux responsables de la formation d'horizons vertiques et de la couleur des sols. Dans l'altérite, une roche felsique produit des kaolinites et une roche mafique produit des smectites. Ces 2 roches ont contribué à la formation des horizons pédologiques. Néanmoins une forte influence felsique engendre plus de sables de quartz et moins d'argile et gène la formation d'horizons vertiques. Par contre dans les horizons superficiels et vertiques, les smectites subissent une transformation en kaolinite via un interstratifié K/S du fait d'une acidification du sol et de l'épuisement de l'alcalinité que constituent les minéraux primaires altérables. A terme ce processus pourrait aussi induire la transformation des Vertisols. Parallèlement, du fer est libéré des silicates et produit de l'hématite rouge à l'amont qui est drainé et des hydroxydes et des formes amorphes à l'aval
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Cazetta, Disnei Amélio. "Épocas de aplicação do nitrogênio nas características agronômicas e na eficiência de uso na cultura do milho /". Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/105133.

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Orientador: Domingos Fornasieri Filho
Banca: Aildson Pereira Duarte
Banca: Orivaldo Arf
Banca: José Carlos Barbosa
Banca: Leandro Borges Lemos.
Resumo: O N é o nutriente exigido em maior quantidade pela cultura do milho, influenciando nas características fenológicas, produtivas e na qualidade de grãos. Para avaliar a influência de épocas de aplicação do N sobre as características agronômicas e de eficiência de uso do nutriente na cultura do milho, o presente trabalho foi desenvolvido nos anos agrícolas 2006/2007 e 2007/2008, em dois ambientes de produção (Jaboticabal - em solo do tipo Latossolo e Itápolis - em solo do tipo Argissolo) no sistema de plantio direto em consolidação, utilizando o delineamento experimental em blocos ao acaso, constituídos por vinte e dois tratamentos, com quatro repetições. Cada parcela foi representada por oito linhas com 6,0 m de comprimento, considerando-se como área útil as quatro linhas centrais, desprezando-se um metro em ambas as extremidades. Concluiu-se que as características agronômicas, nutricionais e de eficiência de uso do N são influenciadas pelas épocas de aplicação de N e pelo ambiente, porém a aplicação de 120 kg ha-1 nos estádios de V4-V5 é superior em relação as demais, proporcionando também maior eficiência agronômica de uso do N; em ambiente de produção de Itápolis, as maiores produtividades são decorrência da aplicação parcelada de N na semeadura, no estádio V4-V5 e V10-V12 (30-60-30), ou pela aplicação total de N no estádio V4-V5; em ambiente de produção de Jaboticabal, as maiores produtividades são promovidas pelo parcelamento do N, como também pela aplicação total do N na semeadura e no estádio V4-V5; a estimativa do teor de clorofila para diferenciar tratamentos de adubação nitrogenada deve ser feita no estádio V10-V11 do milho; o estudo de correlação é viável para o estudo da adubação nitrogenada no milho e serve como uma ferramenta para as demais observações
Abstract: Nitrogen is the nutrient required in greatest quantity by the maize crop, influencing the phenological, yield and grain quality. To assess the influence of timing of N application on agronomic characteristics and use efficiency of nutrient use in maize, this work was developed in the years of 2006/2007 and 2007/2008, in two production environments (Jaboticabal - Oxisol soil type and Itápolis - Alfisol soil type) in no-tillage system in consolidation, using a randomized block design, consisting of twenty-two treatments with four replications. Each plot was represented by eight lines, with 6,0 m long, considering how useful the area four central lines, ignoring one meters at both ends. We conclude that the agronomic characteristics, nutritional and use efficiency of N are influenced by timing of N application and the environment, but the application of 120 kg ha-1 in stages V4-V5 is higher than in the other, also provide the highest agronomic use efficiency of N; in production environment Itápolis, the highest yields are due to split N application at sowing, at the stage V4-V5 and V10-V12 (30-60-30), or the total application of N at V4-V5 stage; in production environment Jaboticabal, the highest yields are promoted by splitting N, as well as the application of total N at sowing and at stage V4-V5, the estimation of chlorophyll content to differentiate fertilization treatments should be done in the V10-V11 stage of maize, the correlation study is feasible for the study of nitrogen fertilization in maize and serves as a tool for other observations
Doutor
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9

Reydellet, Itto. "Effet de la rhizosphère du maïs sur la minéralisation brute de l'azote dans un sol ferrugineux tropical (Burkina Faso)". Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL083N.

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L’objectif de ce travail est d'évaluer l'importance de l'effet rhizosphérique sur la minéralisation de l'azote et d'en déterminer les mécanismes en zone de savane ouest-africaine. L’utilisation de la technique isotopique (15N) et d'un modèle de la dynamique de l'azote permet d'évaluer les flux bruts de minéralisation et d'organisation. Cette technique a été utilisée in situ, sur un sol de la région de Bobo Dioulasso, au Burkina Faso. Les mesures concernent un sol nu et un sol cultivé en maïs. Les résultats des flux d'azote dans le sol suggèrent que le turn-over minéralisation-organisation est très important. Les flux présentent une grande variabilité spatiale et temporelle, qui dépasse les différences entre les traitements. Il est cependant souligné que les méthodes isotopiques classiques de mesures des flux bruts, qui ne tiennent pas compte de l'hétérogénéité induite par les racines, appliquées en sol cultivé peuvent conduire à sous estimer l'augmentation de minéralisation brute due à l'effet rhizosphérique. Une approche du point de vue de la plante est proposée pour l'évaluation de la part de la minéralisation rhizosphérique dans le prélèvement azoté du maïs. Les résultats suggèrent que, dans le cas ou les teneurs en nitrate dans le sol sont très faibles, 35% de l'azote absorbé provient de la minéralisation rhizosphérique. Une méthode d'évaluation des flux bruts de la dynamique de l'azote dans l'environnement des racines a été mise au point. Elle est basée sur un dispositif qui autorise l'échantillonnage du sol à différentes distances de la racine et sur un modèle de simulation de la dynamique des flux d'azote dans l'environnement des racines. La minéralisation brute en présence de racines actives est au moins deux fois plus important que celle du sol hors de l'effet des racines. Ce résultat confirme l'hypothèse d'un effet rhizosphérique stimulant la minéralisation brute de l'azote.
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Wink, Charlote. "ESTOQUE DE CARBONO EM PLANTAÇÕES DE EUCALYPTUS sp. IMPLANTADOS EM CAMPO NATIVO". Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/8650.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The soil management with emphasis in keeping soil residues on surface combined with vegetation growth may reduce carbon (C) emission to the atmosphere. The objective of this study is to measure the effects of the Eucaliptus Forest 20, 44 and 240 months old and native grassland on carbon sequestration in Paleudult, in Santa Maria, RS. The forest production was determined by Smalian method measuring selected trees, chosen from forest inventory based on standard deviation of breast height. The carbon of trees biomass was measured by weighting dry matter of leaves, branches, wood and cork and after converting to C by multiplying by 0.45. The C content in the forest litter, grassland, soil particulate and mineral associated organic matter in six soil layers were determined by CHNS auto analyzer. Soil physical properties as total, macro and microporosity, particle density and size distribution were determined and related to Eucaliptus and grassland. Soil samples were also used to measure some soil chemical properties. The dataset were tested to detect if there were normal distribution and variance homogeneity. To normal or transformed data, analysis of Variance and Tukey test (5%) for variables with significant F was applied. The greatest C stocks were in the wood and cork in all forest ages, however, the proportinal C in leaves and branches decreased with Eucalyptus age.The C stock in forest production added to grassland and litter dry matter increased with substitution of grassland by Eucalyptus Forest, and the difference increased with the age of trees. The content and stock of soil C are low and did not increase with introduction of forest on grassland soil. The soil layers with higher clay content had less C as compared to surface layers with lower clay content and higher C. The particulate organic matter varied the most with forest age and grassland indicating higher sensibility than organic matter associated with soil minerals. The introduction of forest on grassland did not change soil physical properties suggesting that more detailed studies should be done in order to better measure the impact of trees plantation.
O cultivo planejado e consciente do solo com a manutenção do resíduo em superfície e o crescimento equilibrado da vegetação pode amenizar a emissão de carbono (C) para a atmosfera. O objetivo do estudo é conhecer o efeito das florestas de eucalipto aos 20, 44 e 240 meses de idade e do campo nativo no estoque de C em Argissolo Vermelho Distrófico úmbrico, em Santa Maria, Rio Grande do Sul. A produção florestal foi determinada pela cubagem rigorosa por meio do método de Smalian de árvores-amostras selecionadas a partir do cálculo do desvio padrão do diâmetro à altura do peito, obtido por inventário florestal. A estimativa do C na biomassa arbórea foi determinada por pesagem da massa seca dos componentes folhas, galhos, madeira e casca das árvores-amostra, transformados em C considerando um fator de 0,45, conforme Wang et al. (2001). O C presente na serapilheira das florestas, na vegetação do campo nativo, no solo, em seis camadas distribuída em profundidade e nas frações da matéria orgânica particulada e associada a minerais foi determinado por meio de autoanalisador CHNS. As demais propriedades físicas do solo como a porosidade total, macro e microporosidade, densidade de partícula, foram também relacionadas ao efeito das florestas de eucalipto. A caracterização química do solo também foi realizada. Posteriormente à análise de distribuição normal dos dados bem como da homogeneidade de variância, cada variável foi submetida à análise de variância e comparação de médias pelo teste de Tukey, a 5% de probabilidade. Os maiores estoques de carbono estão no componente madeira e na casca independente da idade das florestas, tendendo à diminuição do percentual para os componentes galhos e folhas. A produção do material arbóreo florestal agregado ao material em decomposição, bem como o seu estoque de carbono, aumentam sobremaneira quando da substituição da vegetação nativa de campo para as florestas de eucalipto, adquirindo expressividade no decorrer do crescimento e desenvolvimento das florestas. O teor e estoque de carbono no solo são baixos, indicando que o crescimento das florestas de eucalipto em substituição à vegetação nativa de campo não agregou um aumento significativo, ao contrário das constatações no componente vegetal. As camadas com maior percentual de argila não refletem diferença na presença de C comparado às camadas mais arenosas, ou superficiais, com maior presença de material orgânico. A fração matéria orgânica particulada foi a mais sensível às variações de idade de povoamento e uso da área, e menor variação na fração associada aos minerais do solo devido a suas características de proteção. Para as propriedades físicas do solo, não se observaram variações significativas quando da substituição do campo nativo pelas florestas de eucalipto. Portanto, as proposições para estudos desta magnitude objetivando o mercado de carbono e das florestas como mecanismos de desenvolvimento limpo deverão ser fidedignamente avaliadas e monitoradas durante o crescimento das florestas.
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Książki na temat "Alfisol"

1

Wightman, Waltraud R. Farming systems and water management in an alfisol watershed in the semi-arid tropics of southern India. Kiel: Wissenschaftsverlag Vauk, 1990.

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Nambiar, P. T. C. Nitrogen nutrition of groundnut in alfisols. Patancheru, Andhra Pradesh, India: International Crops Research Institute for the Semi-Arid Tropics, 1990.

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Bruhn, Norbert. Substratgenese, Rumpfflächendynamik: Bodenbildung und Tiefenverwitterung in saprolitisch zersetzten granitischen Gneisen aus Südindien. Kiel: Im Selbstverlag des Geographischen Instituts der Universität Kiel, 1990.

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Ruiz, Luis Martín. El alfil blanco. Salobreña (Granada): Alhulia Editorial, 2002.

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Consultants' Workshop on the State of the Art and Management Alternatives for Optimizing the Productivity of SAT Alfisols and Related Soils (1983 ICRISAT Center, India). Alfisols in the semi-arid tropics: Proceedings of the Consultants' Workshop on the State of the Art and Management Alternatives for Optimizing the Productivity of SAT Alfisols and Related Soils, 1-3 December 1983, ICRISAT Center, India. Patancheru, Andhra Pradesh, India: International Crops Research Institute for the Semi-Arid Tropics, 1987.

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Benincasa, Carmine. Alfio Mongelli: Infinito futuro. Roma: Joyce & Co., 1992.

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Sanz, Eduardo Valdivia. Los sueños del alfil rojo. Perú]: Sietevientos Editores, 2007.

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Cinco damas y un alfil. Chihuahua, México: Universidad Autónoma de Chihuahua, 2010.

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Kruse, Elfriede. Die Holzveredelungsindustrie in Finnland: Struktur- und Standortmerkmale von 1850 bis zur Gegenwart. Kiel: Geographisches Institut der Universität Kiel, 1989.

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Osorio, Eduardo. El juego del gato y el alfil. Toluca, Estado de México, México: Universidad Autónoma del Estado de México, 2012.

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Części książek na temat "Alfisol"

1

Lal, Rattan. "Land-Use Impacts on Soil Physical Properties of an Alfisol in Western Nigeria". W Soil Degradation and Restoration in Africa, 60–70. Boca Raton, FL : CRC Press, Taylor & Francis Group, 2019. | Series: Advances in soil science: CRC Press, 2019. http://dx.doi.org/10.1201/b22321-4.

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Greenberg, W. A., i L. P. Wilding. "Evidence for Contemporary and Relict Redoximorphic Features of an Alfisol in East-Central Texas". W SSSA Special Publications, 227–46. Madison, WI, USA: Soil Science Society of America, 2015. http://dx.doi.org/10.2136/sssaspecpub54.c13.

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Chen, Zueng-Sang, Zeng-Yei Hseu i Chen-Chi Tsai. "Alfisols". W World Soils Book Series, 25–34. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-9726-9_3.

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Bockheim, James G., i Alfred E. Hartemink. "Alfisols". W World Soils Book Series, 129–47. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52144-2_8.

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Thorson, Thor, Chad McGrath, Dean Moberg, Matthew Fillmore, Steven Campbell, Duane Lammers i James G. Bockheim. "Alfisols". W The Soils of Oregon, 201–4. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-90091-5_13.

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Kang, Biauw T., Felix K. Salako i Nilantha R. Hulugalle. "Effect of tillage and woody hedgerows in alley cropping on the productivity of an Alfisol". W Soils of Tropical Forest Ecosystems, 144–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03649-5_16.

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Ito, O., R. Matsunaga, S. Tobita, J. J. Adu-Gyamfi, K. Katayama, T. P. Rao i Gayatri Devi. "Nitrogen fertilizer management in pigeonpea/sorghum intercropping on an Alfisol in the semi-arid tropics". W Plant Nutrition for Sustainable Food Production and Environment, 689–90. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0047-9_221.

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Ito, Osamu, Ryoichi Matsunaga, Satoshi Tobita, Theertham P. Rao i Y. Gayatri Devi. "Spatial distribution of root activity and nitrogen fixation in sorghum/pigeonpea intercropping on an Indian Alfisol". W Plant Nutrition — from Genetic Engineering to Field Practice, 451–54. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1880-4_94.

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Cao, Y., Q. Huang i P. Cai. "Adsorption of Extracellular Polymeric Substances (EPS) from Pseudomonas putida on Various Soil Particles from an Alfisol". W Functions of Natural Organic Matter in Changing Environment, 171–75. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5634-2_30.

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Ae, N., J. Arihara, K. Okada, T. Yoshihara, T. Otani i C. Johansen. "The role of piscidic acid secreted by pigeonpea roots grown in an Alfisol with low-P fertility". W Genetic Aspects of Plant Mineral Nutrition, 279–88. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-011-1650-3_34.

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Streszczenia konferencji na temat "Alfisol"

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C C Truman, J C Ascough II i J G Davis. "Rainfall Intensity Effects on Runoff and Sediment Losses From a Colorado Alfisol". W International Symposium on Erosion and Landscape Evolution (ISELE), 18-21 September 2011, Anchorage, Alaska. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2011. http://dx.doi.org/10.13031/2013.39244.

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"Nitrogen Mineralization Rate of Industrially Manufactured Organic Fertilizers on Alfisol in Southwestern Nigeria". W International Conference on Advances in Agricultural, Biological & Environmental Sciences. International Institute of Chemical, Biological & Environmental Engineering, 2015. http://dx.doi.org/10.15242/iicbe.c0715102.

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Soetedjo, Prijo. "Use of Active Powder To Improve Carrying Capacity Vertisol and Alfisol on Dry Land Farming System". W Proceedings of the International Conference on Food, Agriculture and Natural Resources (FANRes 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/fanres-18.2018.28.

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Mandal, Uttam Kumar, U. S. Victor, N. N. Srivastava, K. L. Sharma, V. Ramesh, M. Vanaja, G. R. Korwar i Y. S. Ramakrishna. "Use of a root zone soil moisture model and crop spectral characteristics to estimate sorghum yields in a dryland Alfisol toposequence". W Asia-Pacific Remote Sensing Symposium, redaktorzy Robert J. Kuligowski, Jai S. Parihar i Genya Saito. SPIE, 2006. http://dx.doi.org/10.1117/12.707846.

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Profumo, Francesco. "In memoriam Alfio Consoli". W 2017 IEEE International Symposium on Sensorless Control for Electrical Drives (SLED). IEEE, 2017. http://dx.doi.org/10.1109/sled.2017.8078414.

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Minardi, Slamet, Setie Harieni, Vercilia Anggraeni Triatmoko, Isna Luthfa Haniati i Suryono. "Influence of manure, zeolite and rock phosphate on soil chemical properties and soybean yield in Alfisols". W 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0003437.

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J.O. Akinyemi i A.O. Adedeji. "Water Infiltration Under No-tillage, Minimum Tillage and Conventional Tillage Systems on a Sandy Loam Alfisols". W 2004, Ottawa, Canada August 1 - 4, 2004. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2004. http://dx.doi.org/10.13031/2013.16384.

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Haniati, Isna Luthfa, Slamet Minardi, Sudadi i Suryono. "Combined applications of manure, rock phosphate and zeolite to increase nutrient uptake and soybean yield in Alfisols". W 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0003052.

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Nikolakopoulos, Konstantinos G., Dimitrios A. Vaiopoulos i George A. Skianis. "Use of multitemporal remote sensing thermal data for the detection of areas with lower temperature in Alfios River basin western Peloponnese, Greece". W Remote Sensing, redaktorzy Manfred Owe, Guido D'Urso, Jose F. Moreno i Alfonso Calera. SPIE, 2004. http://dx.doi.org/10.1117/12.510818.

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Nikolakopoulos, Konstantinos G. "Joint use of multitemporal and multisensor remote sensing data, PCA, and GIS techniques for the detection of changes at the lower Alfios River Channel, Greece". W Remote Sensing for Environmental Monitoring, GIS Applications, and Geology III. SPIE, 2004. http://dx.doi.org/10.1117/12.510820.

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Raporty organizacyjne na temat "Alfisol"

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Busby, Ryan, H. Torbert i Stephen Prior. Soil and vegetation responses to amendment with pulverized classified paper waste. Engineer Research and Development Center (U.S.), maj 2022. http://dx.doi.org/10.21079/11681/44202.

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The United States Army produces a significant amount of classified paper waste that is pulverized to a fine consistency unsuitable for recycling. However, cheap, high quality organic materials such as classified paper waste are useful as soil amendments. The objective of this research was to evaluate the utilization of pulverized classified paper waste as a soil amendment to improve soil health and increase establishment of desirable native grasses on degraded Army training lands. Paper was applied at rates of 9 to 72 Mg ha⁻¹ to two soil types at Fort Polk, LA: an alfisol (very fine sandy loam - Fine, smectitic, thermic Chromic Vertic Hapludalfs) and an ultisol (loamy fine sandy - Loamy, siliceous, semiactive, thermic Arenic Paleudults). These are common soil orders found on military training lands nationwide and represent fertile (alfisol) and unfertile (ulitsol) soils. Vegetation and soils were monitored over 2 growing seasons. No increase in heavy metals were observed in soils. Extensive analysis showed very low levels of regulated contaminants in the paper, but most were below detection limits. The ultisol site showed improved soil physical and chemical properties, while desirable vegetation benefitted from nutrient immobilization at the alfisol site. Based on the results of this study, applying pulverized paper waste to soil at a rate of 35.9 Mg ha⁻¹ is recommended. Application of paper waste to soils had no adverse environmental effects, improved soil physiochemical properties, and facilitated establishment of desirable native vegetation.
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Wells, Aaron, Tracy Christopherson, Gerald Frost, Matthew Macander, Susan Ives, Robert McNown i Erin Johnson. Ecological land survey and soils inventory for Katmai National Park and Preserve, 2016–2017. National Park Service, wrzesień 2021. http://dx.doi.org/10.36967/nrr-2287466.

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This study was conducted to inventory, classify, and map soils and vegetation within the ecosystems of Katmai National Park and Preserve (KATM) using an ecological land survey (ELS) approach. The ecosystem classes identified in the ELS effort were mapped across the park, using an archive of Geo-graphic Information System (GIS) and Remote Sensing (RS) datasets pertaining to land cover, topography, surficial geology, and glacial history. The description and mapping of the landform-vegetation-soil relationships identified in the ELS work provides tools to support the design and implementation of future field- and RS-based studies, facilitates further analysis and contextualization of existing data, and will help inform natural resource management decisions. We collected information on the geomorphic, topographic, hydrologic, pedologic, and vegetation characteristics of ecosystems using a dataset of 724 field plots, of which 407 were sampled by ABR, Inc.—Environmental Research and Services (ABR) staff in 2016–2017, and 317 were from existing, ancillary datasets. ABR field plots were located along transects that were selected using a gradient-direct sampling scheme (Austin and Heligers 1989) to collect data for the range of ecological conditions present within KATM, and to provide the data needed to interpret ecosystem and soils development. The field plot dataset encompassed all of the major environmental gradients and landscape histories present in KATM. Individual state-factors (e.g., soil pH, slope aspect) and other ecosystem components (e.g., geomorphic unit, vegetation species composition and structure) were measured or categorized using standard classification systems developed for Alaska. We described and analyzed the hierarchical relationships among the ecosystem components to classify 92 Plot Ecotypes (local-scale ecosystems) that best partitioned the variation in soils, vegetation, and disturbance properties observed at the field plots. From the 92 Plot Ecotypes, we developed classifications of Map Ecotypes and Disturbance Landscapes that could be mapped across the park. Additionally, using an existing surficial geology map for KATM, we developed a map of Generalized Soil Texture by aggregating similar surficial geology classes into a reduced set of classes representing the predominant soil textures in each. We then intersected the Ecotype map with the General-ized Soil Texture Map in a GIS and aggregated combinations of Map Ecotypes with similar soils to derive and map Soil Landscapes and Soil Great Groups. The classification of Great Groups captures information on the soil as a whole, as opposed to the subgroup classification which focuses on the properties of specific horizons (Soil Survey Staff 1999). Of the 724 plots included in the Ecotype analysis, sufficient soils data for classifying soil subgroups was available for 467 plots. Soils from 8 orders of soil taxonomy were encountered during the field sampling: Alfisols (<1% of the mapped area), Andisols (3%), Entisols (45%), Gelisols (<1%), Histosols (12%), Inceptisols (22%), Mollisols (<1%), and Spodosols (16%). Within these 8 Soil Orders, field plots corresponded to a total of 74 Soil Subgroups, the most common of which were Typic Cryaquents, Typic Cryorthents, Histic Cryaquepts, Vitrandic Cryorthents, and Typic Cryofluvents.
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