Bibliografie tematiche / Crop residue management Australia

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Letteratura scientifica selezionata sul tema "Crop residue management Australia"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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Articoli di riviste sul tema "Crop residue management Australia"

Blair, Graeme J., Les Chapman, A. M. Whitbread, B. Ball-Coelho, P. Larsen e H. Tiessen. "Soil carbon changes resulting from sugarcane trash management at two locations in Queensland, Australia, and in North-East Brazil". Soil Research 36, n. 6 (1998): 873. http://dx.doi.org/10.1071/s98021.

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Sugarcane cropping produces a large amount of crop residues, which offers considerable scope for residue management. Soil samples, collected from 2 long-term experiments in Australia and an experiment in Pernambuco State, Brazil, were analysed for total carbon (CT) and for labile carbon (CL) by oxidation with 333 mM KMnO4. At the 2 locations in Australia, CT and CL concentrations were lower in the surface layer (0-1 cm) of the cropped soil compared with a nearby uncropped reference soil. Burning resulted in a greater loss in CT and CL at a depth of 0-1 cm than green cane trash management. At one of the sites, sugarcane cropping resulted in a decline in CT relative to the reference in the green trash management treatment but an increase in CL. In Brazil, trash management from one cane crop did not change CT over a 12-month period but green cane trash return increased CL. Sustainable sugarcane cropping systems must include crop residue return without burning in order to maintain an active C cycle in the system to drive nutrient cycles.

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Unkovich, Murray, Jeff Baldock e Steve Marvanek. "Which crops should be included in a carbon accounting system for Australian agriculture?" Crop and Pasture Science 60, n. 7 (2009): 617. http://dx.doi.org/10.1071/cp08428.

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Dryland agriculture is both a potential source and potential sink for CO2 and other greenhouse gases. Many carbon accounting systems apply simple emissions factors to production units to estimate greenhouse gas (GHG) fluxes. However, in Australia, substantial variation in climate, soils, and management across >20 Mha of field crop sowings and >30 Mha of sown pastures in the intensive land use zone, provides substantial challenges for a national carbon accounting system, and simple emission factors are unlikely to apply across the region. In Australia a model framework has been developed that requires estimates of crop dry matter production and harvested yield as the first step to obtain carbon (residue) inputs. We use Australian Bureau of Statistics data to identify which crops would need to be included in such a carbon accounting system. Wheat, barley, lupin, and canola accounted for >80% of field crop sowings in Australia in 2006, and a total of 22 crops account for >99% of the sowing area in all States. In some States, only four or six crops can account for 99% of the cropping area. We provide a ranking of these crops for Australia and for each Australian State as a focus for the establishment of a comprehensive carbon accounting framework. Horticultural crops, although diverse, are less important in terms of total area and thus C balances for generic viticulture, vegetables, and orchard fruit crops should suffice. The dataset of crop areas presented here is the most comprehensive account of crop sowings presented in the literature and provides a useful resource for those interested in Australian agriculture. The field crop rankings presented represent only the area of crop sowings and should not be taken as rankings of importance in terms of the magnitude of all GHG fluxes. This awaits a more detailed analysis of climate, soils, and management practices across each of the regions where the crops are grown and their relationships to CO2, nitrous oxide and methane fluxes. For pastures, there is a need for more detailed, up to date, spatially explicit information on the predominant sown pasture types across the Australian cropping belt before C balances for these can be more reliably modelled at the desired spatial scale.

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Bailey, P., e J. Comery. "Management of Heliothis punctigera on field peas in south-eastern Australia". Australian Journal of Experimental Agriculture 27, n. 3 (1987): 439. http://dx.doi.org/10.1071/ea9870439.

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Cypermethrin was found to be an effective substitute for DDT in controlling Heliothis punctigera in field peas. A single spray of cypermethrin prevented significant damage by larvae to field peas in trials in South Australia and Victoria over 3 seasons. Endosulfan was not as effective as cypermethrin. Bioassays of leaf discs dipped in cypermethrin showed that residues of 0.1 mg a.i. kg-1 caused 50% feeding inhibition, 0.43 mg a.i. kg-1 caused 90% feeding inhibition and concentrations above this caused increasing acute mortality to fourth instar larvae. Residues from field pea crops sprayed at 40 g a.i. fell to 0.43 mg a.i. kg-1 2-3 weeks after application. Two to 3 weeks protection is probably the maximum time for residual activity to be useful because the crop outgrows the sprayed foliage. To ensure that larvae are exposed to the maximum area of treated surface, the spray should be timed to coincide with the appearance of larvae in the crop, rather than spraying at a particular growth stage of the crop.

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Kirkegaard, J. A., S. J. Sprague, P. J. Hamblin, J. M. Graham e J. M. Lilley. "Refining crop and livestock management for dual-purpose spring canola (Brassica napus)". Crop and Pasture Science 63, n. 5 (2012): 429. http://dx.doi.org/10.1071/cp12163.

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Dual-purpose canola (Brassica napus) describes the use of a canola crop for grazed winter forage before seed production, a practice that has only recently been developed in southern Australia. Long-season winter canola has been grazed without yield penalty in higher rainfall zones of Australia (>650 mm) and the USA, but the potential areas are small. The feasibility to graze spring canola varieties across wider areas of the medium-rainfall (450–650 mm), mixed-farming zone in Australia is therefore of interest. We conducted a series of six field experiments involving a range of canola cultivars and grazing management and agronomy systems from 2007 to 2009 at Young in southern New South Wales, Australia, to determine the feasibility of and refine the principles for grazing dual-purpose spring canola without significant yield penalty. Mid-season, Australian spring canola cultivars including conventional and hybrid varieties representing a range of herbicide tolerance (triazine-tolerant, Clearfield®, and Roundup Ready®) were sown from 16 April to 12 May and grazed with sheep at a range of growth stages from early vegetative (June) to mid-flowering (September). In general, early-sown crops (sown mid-April) provided significant grazing (~800 dry sheep equivalent grazing days/ha) in winter before bud elongation, and recovered with no impact on grain yield or oil content. As previously reported, yield was significantly reduced (by up to 1 t/ha) when grazing occurred after buds had elongated (late July), due to the delayed flowering associated with bud removal by sheep and insufficient time for biomass and yield recovery. However, yield was also reduced in crops grazed before bud elongation if insufficient residual biomass remained (<1.0 t/ha for late July lock-up) to facilitate crop recovery even when there was little delay in crop development. We suggest that refinements to the existing ‘phenology-based’ grazing recommendations would assist to avoid yield loss in grazed spring varieties, and propose three grazing stages (safe, sensitive, and unsafe) that integrate the impacts of time, crop growth stage, residual biomass, and seasonal conditions to avoid yield loss under different circumstances. Such refinements to reduce the likelihood of grazing-induced yield loss would provide more confidence for mixed farmers to maximise the benefits from dual-purpose canola in different environments. Based on the outcomes of these experiments, dual-purpose spring canola is likely to have significant potential for wider application in other mixed farming zones, with similar region-specific refinements based on the principles reported here.

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Hunt, J. R., C. Browne, T. M. McBeath, K. Verburg, S. Craig e A. M. Whitbread. "Summer fallow weed control and residue management impacts on winter crop yield though soil water and N accumulation in a winter-dominant, low rainfall region of southern Australia". Crop and Pasture Science 64, n. 9 (2013): 922. http://dx.doi.org/10.1071/cp13237.

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The majority of rain used by winter grain crops in the Mallee region of Victoria, Australia, falls during the cooler months of the year (April–October). However, rain falling during the summer fallow period (November–March) and stored as soil moisture contributes to grain yield. Strategies to better capture and store summer fallow rain include (i) retention of crop residues on the soil surface to improve water infiltration and evaporation; and (ii) chemical or mechanical control of summer fallow weeds to reduce transpiration. Despite the widespread adoption of no-till farming systems in the region, few published studies have considered the benefits of residue management during the summer fallow relative to weed control, and none quantify the impacts or identify the mechanisms by which summer fallow weeds influence subsequent crop yield. Over 3 years (2009–11), identical experiments on adjacent sand and clay soil types at Hopetoun in the southern Mallee were conducted to quantify the effect of residue management (standing, removed, or slashed) and summer fallow weed control (± chemical control) compared with cultivation on soil water and nitrogen (N) accumulation and subsequent crop yield. The presence of residue (2.4–5.8 t/ha) had no effect on soil water accumulation and a small negative effect on grain yield on the clay soil in 2011. Controlling summer weeds (Heliotropium europaeum and volunteer crop species) increased soil water accumulation (mean 45 mm) and mineral N (mean 45 kg/ha) before sowing on both soil types in 2 years of the experiment with significant amounts of summer fallow rain (2010 and 2011). Control of summer weeds increased grain yield of canola by 0.6 t/ha in 2010 and wheat by 1.4 t/ha in 2011. Using the data from these experiments to parameterise the APSIM model, simulation of selected treatments using historical climate data (1958–2011) showed that an extra 40 mm of stored soil water resulted in an average additional 0.4 t/ha yield, most of which was achieved in dry growing seasons. An additional 40 kg/ha N increased yield only in wetter growing seasons (mean 0.4 t/ha on both soil types). The combination of extra water and N that was found experimentally to result from control of summer fallow weeds increased subsequent crop yield in all season types (mean 0.7 t/ha on sand, 0.9 t/ha on clay). The co-limitation of yield by water and N in the Mallee environment means that yield increases due to summer weed control (and thus returns on investment) are very reliable.

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Anderson, W. K., M. A. Hamza, D. L. Sharma, M. F. D'Antuono, F. C. Hoyle, N. Hill, B. J. Shackley, M. Amjad e C. Zaicou-Kunesch. "The role of management in yield improvement of the wheat crop—a review with special emphasis on Western Australia". Australian Journal of Agricultural Research 56, n. 11 (2005): 1137. http://dx.doi.org/10.1071/ar05077.

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Modern bread wheat (Triticum aestivum) has been well adapted for survival and production in water-limited environments since it was first domesticated in the Mediterranean basin at least 8000 years ago. Adaptation to various environments has been assisted through selection and cross-breeding for traits that contribute to high and stable yield since that time. Improvements in crop management aimed at improving yield and grain quality probably developed more slowly but the rate of change has accelerated in recent decades. Many studies have shown that the contribution to increased yield from improved management has been about double that from breeding. Both processes have proceeded in parallel, although possibly at different rates in some periods, and positive interactions between breeding and management have been responsible for greater improvements than by either process alone. In southern Australia, management of the wheat crop has focused on improvement of yield and grain quality over the last century. Adaptation has come to be equated with profitability and, recently, with long-term economic and biological viability of the production system. Early emphases on water conservation through the use of bare fallow, crop nutrition through the use of fertilisers, crop rotation with legumes, and mechanisation, have been replaced by, or supplemented with, extensive use of herbicides for weed management, reduced tillage, earlier sowing, retention of crop residues, and the use of ‘break’ crops, largely for management of root diseases. Yields from rainfed wheat crops in Western Australia have doubled since the late 1980s and water-use efficiency has also doubled. The percentage of the crop in Western Australia that qualifies for premium payments for quality has increased 3–4 fold since 1990. Both these trends have been underpinned by the gradual elimination or management of the factors that have been identified as limiting grain yield, grain quality, or long-term viability of the cropping system.

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Jacob, Helen Spafford, David M. Minkey, Robert S. Gallagher e Catherine P. Borger. "Variation in postdispersal weed seed predation in a crop field". Weed Science 54, n. 1 (febbraio 2006): 148–55. http://dx.doi.org/10.1614/ws-05-075r.1.

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Postdispersal weed seed predation by animals during the summer fallow period may lead to a reduction in the number of weeds that grow in the following winter cropping season. In this study, we investigated the patterns of weed seed removal, the influence of crop residue cover on seed removal, the types of granivores present and their seed preferences in a 16-ha postharvest cropping field in Western Australia during the summer months over 2 yr. Seed removal from caches was extremely variable (from 0 to 100%). Removal rates were generally highest along the edges of the field near bordering vegetation and lowest in the center of the field and within the bordering vegetation. However, there were many deviations from this general pattern. There was no change in rates of predation with different levels of residue cover. Ants or other small invertebrates were found to remove the most seeds. However, seed removal by other animals, such as rodents, was also evident. Annual ryegrass seeds were preferred over wild oat seeds, followed by wild radish pod segments. Seed harvesting was lowest in late January, peaked in February, and decreased in March. Results from this study suggest seed harvesters could reduce the number of surface seeds in the field, reducing the weed seed bank. Management options that increase the activity of the seed harvesters may lead to less variability in seed predation and could, therefore, be incorporated into an integrated weed management program.

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Lyon, Drew J., David R. Huggins e John F. Spring. "Windrow Burning Eliminates Italian Ryegrass (Lolium perenne ssp. multiflorum) Seed Viability". Weed Technology 30, n. 1 (marzo 2016): 279–83. http://dx.doi.org/10.1614/wt-d-15-00118.1.

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Windrow burning is one of several harvest weed seed control strategies that have been developed and evaluated in Australia to address the widespread evolution of multiple herbicide resistance in annual weeds. Herbicide-resistant Italian ryegrass populations are common in the Palouse region of eastern Washington and northern Idaho. Field and greenhouse studies were conducted to evaluate the effects of burning standing stubble and narrow windrows on the survival of Italian ryegrass seed on the soil surface and to determine the amount of crop residue remaining after both practices. Italian ryegrass emergence was 63, 48, and 1% for the nonburned check, burned standing stubble, and burned windrow treatments, respectively. Crop-residue dry weights were 9.94, 5.69, and 5.79 Mg ha−1 for these same treatments. Windrow burning can be an effective tactic in an integrated weed management strategy for Italian ryegrass control in the Palouse region of eastern Washington and northern Idaho.

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Mahajan, Gulshan, Amar Matloob, Michael Walsh e Bhagirath S. Chauhan. "Germination Ecology of Two Australian Populations of African turnipweed (Sisymbrium thellungii)". Weed Science 66, n. 6 (14 settembre 2018): 752–57. http://dx.doi.org/10.1017/wsc.2018.55.

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AbstractAfrican turnipweed (Sisymbrium thellungiiO. E.Schulz) is an emerging problematic broadleaf weed of the northern grain region of Australia. Laboratory experiments were conducted to evaluate the effects of temperature, light, salinity, pH, seed burial depth, and the amount of wheat crop residue on germination and emergence of two AustralianS. thellungiiweed populations (population C, cropped area; population F, fence line). Both populations behaved similarly across different environmental conditions, except in the residue study. Although the seeds of both populations ofS. thellungiicould germinate under complete darkness, germination was best (~95%) under light/dark conditions at the 20/10 C temperature regime. Both populations ofS. thellungiigerminated over a wide range of day/night temperatures (15/5, 20/10, 25/15, and 30/20 C). Osmotic stress had negative effects on germination, with 54% seeds (averaged over populations) able to germinate at −0.1MPa. Complete germination inhibition for both populations was observed at −0.8MPa osmotic potential. Both populations germinated at sodium chloride (NaCl) concentrations ranging from 50 to 100 mM, beyond which germination was completely inhibited. There were substantial reductions in seed germination, 32% (averaged over populations) under highly acidic conditions (pH 4.0) as compared with the control (water: pH 6.4). Seed germination of both populations on the soil surface was 77%, and no seedlings emerged from a burial depth of 1 cm. The addition of 6 Mg ha−1of wheat (Triticum aestivumL.) residue reduced the emergence of the C and F populations ofS. thellungiiby 75% and 64%, respectively, as compared with the control (no residue). Information gathered from this study provides a better understanding of the factors favorable for germination and emergence ofS. thellungii, which will aid in developing management strategies in winter crops, especially wheat, barley (Hordeum vulgareL.), and chick pea (Cicer arietinumL.).

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Robertson, Fiona, Roger Armstrong, Debra Partington, Roger Perris, Ivanah Oliver, Colin Aumann, Doug Crawford e David Rees. "Effect of cropping practices on soil organic carbon: evidence from long-term field experiments in Victoria, Australia". Soil Research 53, n. 6 (2015): 636. http://dx.doi.org/10.1071/sr14227.

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Despite considerable research, predicting how soil organic carbon (SOC) in grain production systems will respond to conservation management practices, such as reduced tillage, residue retention and alternative rotations, remains difficult because of the slowness of change and apparent site specificity of the effects. We compared SOC stocks (equivalent soil mass to ~0–0.3 m depth) under various tillage, residue management and rotation treatments in three long-term (12-, 28- and 94-year-old) field experiments in two contrasting environments (Mallee and Wimmera regions). Our hypotheses were that SOC stocks are increased by: (1) minimum tillage rather than traditional tillage; (2) continuous cropping, rather than crop–fallow rotations; and (3) phases of crop or pasture legumes in rotations, relative to continuous cropping with cereals. We found that zero tillage and stubble retention increased SOC in some circumstances (by up to 1.5 Mg C ha–1, or 8%) but not in others. Inclusion of bare fallow in rotations reduced SOC (by 1.4–2.4 Mg C ha–1, or 8–12%) compared with continuous cropping. Including a pulse crop (field pea, where the grain was harvested) in rotations also increased SOC in some instances (by ~6–8 Mg C ha–1, or 29–35%) but not in others. Similarly, leguminous pasture (medic or lucerne) phases in rotations either increased SOC (by 3.5 Mg C ha–1, or 21%) or had no significant effect compared with continuous wheat. Inclusion of a vetch green manure or unfertilised oat pasture in the rotation did not significantly increase SOC compared with continuous wheat. The responses in SOC to these management treatments were likely to be due, in part, to differences in nitrogen and water availability (and their effects on carbon inputs and decomposition) and, in part, to other, unidentified, interactions. We conclude that the management practices examined in the present study may not reliably increase SOC on their own, but that significant increases in SOC are possible under some circumstances through the long-term use of multiple practices, such as stubble retention + zero tillage + legume N input + elimination of fallow. The circumstances under which increases in SOC can be achieved require further investigation.

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Più fonti

Tesi sul tema "Crop residue management Australia"

Collins, Shane. "Residue composition influences nutrient release from crop residues". University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0171.

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[Truncated abstract] A greater adoption of stubble retention, minimum-till and no-till farming practices for the purposes of conserving soil, water and fertility requires a greater understanding of the complexity of physical and chemical interactions between the soil and crop residues. There is currently insufficient knowledge to allow reliable predictions of the effects of different residue types in different environments on soil fertility and crop growth, owing to the many residue characteristics and environmental interactions that have been shown to affect decomposition or nutrient release. The role of fibre and nutrient composition in nutrient release from crop residues, and implications for residue management techniques, were studied. Canola, lupin and field pea residues, obtained from farmland in Meckering and Northam, Western Australia, were separated into upper and basal stems, leaves, and siliques or pods. This was done to provide materials with a wide range of chemical and physical characteristics, and also allowed consideration of differential residue management of plant organs, such as comparing harvested canola siliques and retained canola stubble. Pre-treatment by chopping and/or humidification was applied to residues to provide some information about the processes of nutrient release. Residues were subjected to simulated rainfall to assess nutrient leaching from plant material, and placed on soil in pots in constant-temperature glasshouse conditions to assess decomposition. Amounts and rates of change of residue fibre and nutrients were determined throughout leaching and decomposition. Energy Dispersive X-ray (EDX) microanalysis was used to assess the location of diffusible ions in air-dried residues and the effects of humidification on nutrient positioning and release. ... However, the release of calcium and magnesium depended on the decomposition of the more recalcitrant components such as cellulose and lignin, as supported by microscopy results showing changes in nutrient distribution following humidification. The proportionality of amounts of calcium and magnesium leached and released during decomposition is likely to suggest a similarity of chemical form more than similarity of function or position of the two elements. Management of crop residues for maximising and optimising the timing of release of different nutrients will need to take into account the placement of different plant types and parts, particle sizes distribution and pre-treatment of material to efficiently manage short- and long-term soil fertility to sustain crops, particularly on degraded soils. Significant nutrient release of potassium, sulphur and magnesium from crop residues can be achieved from surface placement, with the release of potassium and sulphur managed by modifying residue particle size through appropriate harvesting, ploughing or sowing implement selection. High nutrient uptake crops and plant parts where they can be economically viable to grow or separated by the harvesting technique are particularly valuable as sources of nutrients and soil organic matter.

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Valizadeh, Reza. "Summer nutrition of sheep based on residues of annual crops and medic pastures". Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phv172.pdf.

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Myers, Brian. "Variable crop residue management". Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/35271.

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Master of Agribusiness
Department of Agricultural Economics
Jeffery R. Williams
Production agriculture is constantly evolving to become more efficient and productive. Crop residue serves as a valuable source of nutrients for the soil, but it is increasingly abundant with today’s enhanced crop genetics. If new technology can effectively provide a way to micro-manage crop residue levels within a field, the benefits will go beyond soil health. Surplus crop residue can be collected for secondary income while leaving the optimum amounts in the field to maintain the environment and soil health as well as promote future crop growth. The main objective of this study is to create a budget model that will determine the economic impact of crop residue removal on a controlled basis. The goals are to determine crop residue removal practices that are sustainable for the long-term, while also enhancing soil quality and increasing grain yield in future years. A sub-objective is to build a business case for producers to invest in variable crop residue management. The hypothesis presented in this study is that the increased complexity and price of a variable rate system is offset by more supplemental profits, increased crop yields, and better management of soil health and nutrients. The negative perceptions of crop residue removal include the fear of soil erosion or loss of soil organic matter. By developing a budget model that is easy to use, takes advantage of existing field data for inputs, and allows producers the ability to look at their operations on a sub-field level, this study aims to provide the necessary motivation to invest in new technology that will increase their productivity. By entering their site-specific crop residue return rate data into a budget model, along with prices and costs related to combine and auxiliary equipment, corn and corn stover, transportation and logistics, and nutrient replacement, they will come up with a return per acre for both constant rate and variable rate collection. The budget model determines whether it is economically viable to harvest crop residue from a continuous corn rotation at a variable rate across a field, rather than at a constant rate, using a producer’s own specific field data. To validate the concept, data from a joint study between John Deere and Iowa State is entered into the model. Prescriptions for corn stover return rates are provided from the study for pre-defined grid areas. Prescriptions are derived from a combination of data including grain yield, soil loss due to wind and water erosion, climate, topography, and soil sample data at time of planting (Nelson, et al. 2004). The average corn stover removal percentage was less for variable rate collection than constant rate collection, 26.05% to 31.85%. However, the assumption that grain yield and corn stover yield are positively correlated did not prove to be true in this case study. The variable rate plots had a lower average grain yield of 158.84 bushel/acre, compared to 160.46 for the constant rate plots, but they had more total corn stover available and therefore a higher return rate of 3.70 tons/acre, compared to 3.05 for the constant rate plots. This case study illustrates that less corn stover can be returned to the field through constant or variable rate collection while sustaining higher grain yields than a conventional harvest that would return all of the corn stover to the field. This case study demonstrates that variable rate collection can be more expensive than constant rate, but not in every situation. Every unique field site will require a specific crop residue management recommendation that is determined by both economic and environmental factors.

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He, Yuxin. "Crop residue management and its impacts on soil properties". Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19043.

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Doctor of Philosophy
Agronomy
DeAnn R. Presley
Crop residue removal for livestock feeding and biofuel production at large scales must be evaluated to assess impacts on soil productivity and properties. Among all the potential negative impacts, wind erosion is a major concern in the central Great Plains. We conducted an on-farm study from 2011 to 2013 by removing crop residue at five levels (0, 25, 50, 75, and 100%) to determine the effects of crop residue removal on soil wind erosion parameters such as dry aggregate size distribution including soil wind erodible fraction (EF <0.84 mm aggregates), geometric mean diameter (GMD) and geometric standard deviation (GSD), dry aggregate stability, and soil surface roughness. The sub-model of Wind Erosion Prediction System (WEPS) developed by the USDA-ARS, Single-event Wind Erosion Evaluation Program (SWEEP) is a stand-alone companion software package that can be applied to simulate soil loss and dust emission from a single windstorm event. We applied measured data (i.e. EF, GMD, GSD, and roughness) to SWEEP for predicting wind velocity that can initiate wind erosion and soil loss under each crop residue removal condition with wind velocity at 13 m sˉ¹. The threshold wind velocity to initiate wind erosion generally decreased with increase in crop residue removal levels, particularly for residue removal >75%. The total amount of soil loss in 3 hours ranged from about 0.2 to 2.5 kg mˉ² and depends on soil condition and crop residue cover. On the other hand, high-yielding crops can produce abundant crop residue, which then raises the question that if a farmer wants to reduce residue, what could they do without removing it? The application of fertilizer on crop residue to stimulate microbial activity and subsequent decomposition of the residue is often debated. We conducted wheat straw decomposition field experiments under different fertilizer rates and combinations at three locations in western Kansas following wheat harvest in 2011 and 2012. A double shear box apparatus instrumented with a load cell measured the shear stress required to cut wheat straw and photomicrography was used to measure the cross-sectional area of wheat straw after shearing. Total C and N were also analyzed. The fertilizer rate and timing of application during summer 2012 and Fall 2013 at the Hays site had impacts on wheat straw shear stress at break point. Across site years, earlier (fall) fertilizer application generally resulted in lower remaining aboveground biomass as compared to a spring application. Multivariate and linear regressions suggested that N and C:N ratio partially explain the results observed with respect to treatment effects on winter wheat residue decomposition.

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Gherardi, Mark James. "Availability and management of manganese and water in bauxite residue revegetation". University of Western Australia. Soil Science and Plant Nutrition Discipline Group, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0038.

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[Truncated abstract] Industrial processing to refine alumina from bauxite ore produces millions of tonnes of refining residue each year in Australia. Revegetation of bauxite residue sand (BRS) is problematic for a number of reasons. Harsh chemical conditions caused by residual NaOH from ore digestion mean plants must overcome extremely high pH (initially >12), saline and sodic conditions. At such high pH, manganese (Mn) is rapidly oxidised from Mn2+ to Mn4+. Plants can take up only Mn2+. Thus, Mn deficiency is common in plants used for direct BRS revegetation, and broadcast Mn fertilisers have low residual value. Added to this, physical conditions of low water-holding capacity and a highly compactable structure make BRS unfavourable for productive plant growth without constant and large inputs of water as well as Mn. However, environmental regulations stipulate that the residue disposal area at Pinjarra, Western Australia, be revegetated to conform with surrounding land uses. The major land use of the area is pasture for grazing stock. Hence, pasture revegetation with minimum requirement for fertiliser and water application is desirable. This thesis investigates a number of avenues with potential for maintaining a productive pasture system on BRS whilst reducing the current level of Mn fertiliser and irrigation input. Emphasis was placed on elucidation of chemical and physical factors affecting Mn availability to plants in BRS

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Gelder, Brian Keith. "Land management database development methods for delineating management units and estimating crop and residue cover /". [Ames, Iowa : Iowa State University], 2007.

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Battaglia, Martin. "Crop residue management effects on crop production, greenhouse gases emissions, and soil quality in the Mid-Atlantic USA". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/86483.

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Cellulosic biomass-to-bioenergy systems can provide environmental and economic benefits to modern societies, reducing the dependence on fossil-fuels and greenhouse gas emissions while simultaneously improving rural economies. Corn (Zea mays L.) stover and wheat straw (Triticum aestivum L.) residues have particular promise given these crops are widely grown and their cellulosic fractions present a captured resource as a co-product of grain production. Annual systems also offer the ability to change crops rapidly in response to changing market demands. However, concerns exist about residue removal effects on soil health, greenhouse gases emissions and subsequent crop productivity. The carbon footprint and the crop yield productivity and soil health responses resulting from the removal of crop residues has been studied extensively over the last 20 years, but this research has been largely conducted in the Corn Belt. To investigate the impact of crop residue removal in the Mid-Atlantic USA, combinations of corn stover (0, 3.33, 6.66, 10 and 20 Mg ha-1) and wheat straw (0, 1.0, 2.0, and 3.0 Mgha-1) were soil applied in a corn-wheat/soybean (Glycine max L. Merr.) rotation in Virginia's Coastal Plain. Corn stover (0, 3.33, 6.66, 10 and 20 Mg ha-1) was applied in a continuous corn cropping system in the Ridge/Valley province. For each system, residues were applied following grain harvest over two production cycles. Each experiment was conducted as a randomized complete design with four replications. The highest rates of stover retention resulted in greater greenhouse gas emissions in year 1, but not year 2 of these studies and did not affect overall global warming potentials. Stover application also increased soil carbon but had little effect on other measures of soil quality. Stover K levels were greater with high rates of stover retention. Overall, these studies indicate little effect of residue removal or retention (above typical residue production rates) on subsequent crop production, greenhouse gas emissions, or soil health measures in the short term. This study is one of the first to assess residue removal in the Mid-Atlantic USA and is the first study to investigate the impacts that managing more than one crop residue in a multi-crop system. Longer-term research of this type may be warranted both to determine the consequences of residue management and to start building a regionally-specific body of knowledge about these practices.
Ph. D.

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Zheng, Baojuan. "Broad-scale Assessment of Crop Residue Management Using Multi-temporal Remote Sensing Imagery". Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/19201.

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Tillage practices have changed dramatically during the past several decades as agricultural specialists have recognized the unfavorable environmental effects of mechanized tillage. Alternatively, conservation tillage management can mitigate adverse environmental impacts of tillage, such as soil and water degradation. Adoption of conservation tillage has continued to increase since its first introduction, which raises questions of when and where it is practiced. Spatial and temporal specifics of tillage practices form important dimensions for development of effective crop management practices and policies. Because Landsat has been and will continue to image the Earth globally, it provides opportunities for systematic mapping of crop residue cover (CRC) /tillage practices. Thus, the overall objective of this study is to develop methodologies to improve our ability to monitor crop management across different landscapes in a time-efficient and cost-effective manner using Landsat TM and ETM+ imagery, which is addressed in three separate studies. The first study found that previous efforts to estimate CRC along a continuum using Landsat-based tillage indices were unsuccessful because they neglected the key temporal changes in agricultural surfaces caused by tilling, planting, and crop emergence at the start of the growing season. The first study addressed this difficulty by extracting minimum values of multi-temporal NDTI (Normalized Difference Tillage Index) spectral profiles, designated here as the minNDTI method. The minNDTI improves crop residue estimation along a continuum (R2 = 0.87) as well as tillage classification accuracy (overall accuracy > 90%). A second study evaluated effectiveness of the minNDTI approach for assessing CRC at multiple locations over several years, and compared minNDTI to hyperspectral tillage index (CAI), and the ASTER tillage index (SINDRI). The minNDTI is effective across four different locations (R2 of 0.56 ~ 0.93). The third study, built upon the second study, addressed the Landsat ETM+ missing data issue, and devised methodologies for producing field-level tillage data at broad scales (multiple counties). In summary, this research demonstrates that the minNDTI technique is currently the best alternative for monitoring CRC and tillage practices from space, and provides a foundation for monitoring crop residue cover at broad spatial and temporal scales.
Ph. D.

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Tao, Hsiao-Hang. "Crop residue management in oil palm plantations : soil quality, soil biota and ecosystem functions". Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:ebcc3bd9-45c0-4d22-9fef-71dff4abecd3.

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The application of crop residues is one of the most common agricultural practices used to maintain soil ecosystems and crop productivity. This thesis focuses on the oil palm (Elaeis guineensis) agroecosystem, an important tropical crop that has expanded rapidly over the past four decades. Both land conversion and business-as-usual practices within the plantations have contributed to soil degradation. The application of oil palm residues, such as empty fruit bunches (EFB) and oil palm fronds, are thought to have positive effects on the soil ecosystem; yet there is currently a deficit of knowledge on their effectiveness. This thesis aims to examine the effects of oil palm residue application on soil physicochemical properties, soil biota, and ecosystem functions. It reports the results of extensive field trials, sample collection, and statistical analysis of crop residue applications in oil palm plantations in Central Sumatra, Indonesia. Four key results emerged from the thesis. First, in this study site land conversion from secondary forest to oil palm does not affect litter decomposition rate, but positively influences soil fauna activity. Second, there is greater soil fauna activity following EFB application than oil palm fronds or chemical fertilizers, and the fauna activity is highly associated with changes in soil chemical properties and soil moisture conditions. Third, EFB application enhances soil ecosystem functions, through the direct provision of organic matter, and by influencing soil biota. Finally, over 15 years of application, EFB appears to be effective in maintaining or increasing annual crop yield in comparison to chemical fertiliser treatment. Temporal changes in crop yield under EFB application appear to be associated with climatic conditions and soil organic carbon. Overall, these findings improve our understanding of the potential of oil palm residue applications to increase soil quality, soil biota, and ecosystem functions. They also provide useful information for a wider audience of soil ecologists, agricultural managers, and policy makers to improve sustainable management of the oil palm ecosystem.

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Montague, Thomas L. "The management of browsing damage caused by wallabies in Australian plantations". Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670283.

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Libri sul tema "Crop residue management Australia"

US DEPARTMENT OF AGRICULTURE. USDA crop residue management action plan. [United States]: USDA, 1992.

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Bull, Leonard. Crop residue management and tillage system trends. Washington, DC: U.S. Dept. of Agriculture, ERS, 1996.

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Great, Plains Residue Management Conference (1994 Amarillo Tex ). A future using residue management: Proceedings : Great Plains Residue Management Conference, August 15-17, 1994, Amarillo, Texas. [United States]: The Council, 1994.

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Bull, Leonard. Residue and tillage systems for field crops. [Washington, DC]: U.S. Dept. of Agriculture, Economic Research Service, Resources and Technology Division, 1993.

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Drewes, Norbert. Umsatz verschiedener Ernterückstände in einem Bodensäulenversuchssystem: Einfluss auf die organische Bodensubstanz und den Transport zweier Xenobiotika. [Jülich]: Forschungszentrum Jülich, 2005.

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Lamarca, Carlos Crovetto. Stubble over the soil: The vital role of plant residue in soil management to improve soil quality. Madison, WI: American Society of Agronomy, 1996.

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Hermanson, Ronald E. No-tillage drill design. [Pullman, Wash: Cooperative Extension, College of Agriculture & Home Economics, Washington State University, 1985.

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International Symposium on Climatic Risk in Crop Production (1990 Brisbane, Qld.). Climatic risk in crop production: Models and management for the semiarid tropics and subtropics : proceedings of the International Symposium on Climatic Risk in Crop Production held in Brisbane, Australia, 2-6 July, 1990. Wallingford, UK: CAB International, 1991.

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1953-, Muchow Russell C., e Bellamy J. A, a cura di. Climatic risk in crop production: Models and management for the semiarid tropics and subtropics : proceedings of the International Symposium on Climatic Risk in Crop Production: Models and Management for the Semiarid Tropics and Subtropics held in Brisbane, Australia, 2-6 July, 1990. Wallingford, UK: CAB International, 1991.

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L, Hatfield Jerry, e Stewart B. A. 1932-, a cura di. Crops residue management. Boca Raton: Lewis Publishers, 1994.

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Capitoli di libri sul tema "Crop residue management Australia"

Gupta, V. V. S. R., Peter R. Grace e M. M. Roper. "Carbon and Nitrogen Mineralization as Influenced by Long-Term Soil and Crop Residue Management Systems in Australia". In SSSA Special Publications, 193–200. Madison, WI, USA: Soil Science Society of America and American Society of Agronomy, 2015. http://dx.doi.org/10.2136/sssaspecpub35.c13.

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Reddy, P. Parvatha. "Crop Residue Management". In Sustainable Intensification of Crop Production, 83–92. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2702-4_6.

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Prasad, Rajendra, e J. F. Power. "Crop Residue Management". In Advances in Soil Science, 205–51. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3030-4_5.

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Reddy, P. Parvatha. "Crop Residue Management and Organic Amendments". In Agro-ecological Approaches to Pest Management for Sustainable Agriculture, 29–41. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4325-3_3.

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Molina, J. A. E., M. J. Shaffer, R. H. Dowdy e J. F. Power. "Simulation of Tillage Residue and Nitrogen Management". In Soil Erosion and Crop Productivity, 413–30. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1985.soilerosionandcrop.c22.

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Blanco-Canqui, Humberto, e Rattan Lal. "Crop Residue Management and Soil Carbon Dynamics". In SSSA Special Publications, 291–309. Madison, WI, USA: American Society of Agronomy and Soil Science Society of America, 2015. http://dx.doi.org/10.2136/sssaspecpub57.2ed.c17.

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Kronstad, W. E., W. L. McCuistion, M. L. Swearingin e C. O. Qualset. "Crop Selection for Specific Residue Management Systems". In ASA Special Publications, 207–17. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2015. http://dx.doi.org/10.2134/asaspecpub31.c12.

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Kumar, Ravindra, Anil Kumar e Dang Nguyen Thoai. "Solar Thermal Application for Crop Residue Management". In Lecture Notes in Mechanical Engineering, 303–15. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9678-0_27.

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Triplett, G. B., e J. V. Mannering. "Crop Residue Management in Crop Rotation and Multiple Cropping Systems". In ASA Special Publications, 187–206. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2015. http://dx.doi.org/10.2134/asaspecpub31.c11.

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Rusinamhodzi, Leonard. "Crop Rotations and Residue Management in Conservation Agriculture". In Conservation Agriculture, 21–37. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11620-4_2.

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Atti di convegni sul tema "Crop residue management Australia"

Kaspar, Tom. "Residue and Compaction Management". In Proceedings of the 1992 Crop Production and Protection Conference. Iowa State University, Digital Press, 1993. http://dx.doi.org/10.31274/icm-180809-444.

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Johnson, Richard. "Residue Management with Chisel-Type Implements". In Proceedings of the First Annual Crop Production and Protection Conference. Iowa State University, Digital Press, 1992. http://dx.doi.org/10.31274/icm-180809-383.

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Zimprich, Jeffrey J. "Crop Residue Management- Part of Farming in the Future". In Proceedings of the 1992 Crop Production and Protection Conference. Iowa State University, Digital Press, 1992. http://dx.doi.org/10.31274/icm-180809-404.

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Hanna, Mark, Don Erbach, Tom Kaspar, Muhammed Iqbal e Stephen Marley. "Corn Planter Attachment Effects on Soil and Residue". In Proceedings of the 1995 Integrated Crop Management Conference. Iowa State University, Digital Press, 1996. http://dx.doi.org/10.31274/icm-180809-542.

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Hanna, H. Mark, Dwaine S. Bundy, Jeffery C. Lorimor, Steven K. Mickelson e Stewart W. Melvin. "Manue Application Effects on Residue, Odor, and Placement". In Proceedings of the 1995 Integrated Crop Management Conference. Iowa State University, Digital Press, 1997. http://dx.doi.org/10.31274/icm-180809-569.

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Sawyer, John E., Jose L. Pantoja e Daniel W. Barker. "Effect of a rye cover crop and crop residue removal on corn nitrogen fertilization". In Proceedings of the 21st Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2011. http://dx.doi.org/10.31274/icm-180809-75.

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Nafziger, Emerson D. "Continuous corn response to residue removal, tillage, and nitrogen". In Proceedings of the 24th Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2013. http://dx.doi.org/10.31274/icm-180809-108.

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Al-Kaisi, Mahdi, e Jose Guzman. "Residue biomass removal and potential impact on production and environmental quality". In Proceedings of the 21st Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2011. http://dx.doi.org/10.31274/icm-180809-78.

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Mallarino, Antonio P., Ryan R. Oltmans, Jacob R. Prater, Carlos X. Villavicencio e Louis B. Thompson. "Nutrient uptake by corn and soybean, removal, and recycling with crop residue". In Proceedings of the 28th Annual Integrated Crop Management Conference. Iowa State University, Digital Press, 2011. http://dx.doi.org/10.31274/icm-180809-269.

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"Crop Rotation and Residue Management Effects on Deficit Irrigated Cotton and Corn". In 2015 ASABE / IA Irrigation Symposium: Emerging Technologies for Sustainable Irrigation - A Tribute to the Career of Terry Howell, Sr. Conference Proceedings. American Society of Agricultural and Biological Engineers, 2015. http://dx.doi.org/10.13031/irrig.20152143137.

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Rapporti di organizzazioni sul tema "Crop residue management Australia"

McNairn, H., D. Wood, Q. H. J. Gwyn, R. J. Brown e F. Charbonneau. Mapping Tillage and Crop Residue Management Practices with RADARSAT. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/219178.

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