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Letteratura scientifica selezionata sul tema "Fertilizers"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 29 luglio 2024

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Articoli di riviste sul tema "Fertilizers"

Tiwari, Pragati. "Fertilizer Consumption and Productionin India". International Journal of Agriculture and Animal Production, n. 44 (3 giugno 2024): 10–18. http://dx.doi.org/10.55529/ijaap.44.10.18.

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Fertilizers are one of the most important sectors in India. It is an essential input for agricultural production. Fertilizers play an important role in increasing agricultural productivity. The paper tells about fertilizer’s consumption and production of Indians well as analyze fertilizer sector. This is a conceptual and descriptive nature paper. It is based on secondary data. Companies should prepare their production and distribution plans as per the needs and interests of farmers. Today the farmers do not accept any product that does not satisfy them. Production of crops is increasing due to fertilizer consumption in India. But more usage of urea is misbalancing the ideal fertilizer application ratio. So, Farmers have to shift from straight fertilizers towards NPKS complex fertilizers for supplying the vital nutrients are needed by the crops for growth to improve this ratio.

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Kai, Takamitsu, e Dinesh Adhikari. "Effect of Organic and Chemical Fertilizer Application on Apple Nutrient Content and Orchard Soil Condition". Agriculture 11, n. 4 (10 aprile 2021): 340. http://dx.doi.org/10.3390/agriculture11040340.

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Apple cultivation in Japan typically involves the use of chemical fertilizers and pesticides which can damage the environment. Therefore, in this study we investigated the orchard soil biochemical characteristics as well as the fruit nutrient contents, and pesticide residues of apples grown either organically (organic fertilizers + reduced pesticides) or with conventional chemical fertilizers and pesticide rates. Compared with conventional chemical fertilizer treatment, the organic fertilizer treatment produced fruit with significantly higher contents of sugar, as well as soil with higher total carbon, total nitrogen, and total phosphorus. There were also significantly greater soil bacterial biomass and N circulation in the organically fertilized treatments. Minimal pesticide residues were detected in the organically fertilized fruits, but in the apples cultivated with conventional rates of fertilizers and pesticides there were significantly higher levels of propargite that was used to control spider mites. These residue levels from the conventionally fertilized orchards exceeded European and Codex residue standards. These results indicate that environmentally friendly arboricultural soil management practices, such as organic fertilizer and reduced pesticide cultivation can enhance nutrient cycling in soil, reduce the burden on the environment, and promote food safety and security.

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Naumetov, R. V. "THE EFFECTIVENESS OF THE USE OF COMPLEX FERTILIZERS ON THE YIELD AND GRAIN QUALITY OF SPRING WHEAT, BARLEY AND WINTER RYE". Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. Agricultural Sciences 1, n. 2 (2022): 56–61. http://dx.doi.org/10.37313/2782-6562-2022-1-2-56-61.

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The research was comparative estimation of the effectiveness of the application of compound fertilizers monoammonium phosphate, nitroammofosa and double superphosphate at sowing in rows on the productivity and the quality of the grain production of spring wheat , barley and winter rye on fertilizer and fertilized background. Research findings suggest that the introduction of double superphosphate in rows during sowing grain on soils with a high content of phosphorus in the background without nitrogen fertilizer inefficiently. The introduction of complex fertilizers in rows at crop fertilizer more effectively at the background. Row fertilizer has a positive impact on the quality of the grain. The most high-quality grain is formed by the rows of compound fertilizers (nitroammofosa).

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Broschat, T. K., D. R. Sandrock, M. L. Elliott e E. F. Gilman. "Effects of Fertilizer Type on Quality and Nutrient Content of Established Landscape Plants in Florida". HortTechnology 18, n. 2 (gennaio 2008): 278–85. http://dx.doi.org/10.21273/horttech.18.2.278.

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In a series of three experiments, st. augustinegrass (Stenotaphrum secundatum ‘Floratam’), areca palm (Dypsis lutescens), canna (Canna × generalis ‘Richard Wallace’), pentas (Pentas lanceolata), allamanda (Allamanda cathartica ‘Hendersoni’), and nandina (Nandina domestica) were grown on highly leached sand soils in two locations in Florida. They were fertilized with typical turfgrass fertilizers having high nitrogen (N)-to-potassium (K) ratios and no magnesium (Mg), or several types of landscape palm fertilizers having low N:K ratios and 100% of their N, K, and Mg in controlled release form. St. augustinegrass, pentas, nandina, and allamanda visual quality were similar for all fertilizer types tested. However, cannas and areca palms had higher visual qualities when fertilized with an 8N–0.9P–10.0K–4Mg palm fertilizer than with higher N:K ratio turf fertilizers. High N:K turf fertilizers resulted in K deficiency severity equivalent to that of unfertilized controls and Mg deficiency that was more severe than unfertilized areca palms.

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R.Z. Margate, J.N. Maravilla, R.M. Ebuna e M.N. Eroy. "RESPONSE OF COCONUT AND COFFEE TO FERTILIZERS APPLIED ON EITHER OR BOTH CROPS IN AN INTERCROPPING SYSTEM". CORD 10, n. 02 (1 dicembre 1994): 34. http://dx.doi.org/10.37833/cord.v10i02.282.

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A study to assess the effects of fertilizer application on either coconut or coffee or both, in an intercropping system was conducted from 1985 to 1991. at the Davao Research Center, Mindanao, Philippines. The coconuts were planted at 8 m x 8 m square system. Fertilizer application on coconut intercropped with either fertilized or unfertilized coffee increased copra yield significantly. A very slight increase in copra per nut was noted on un‑fertilized coconut even with fertilized coffee intercrop indicating coconut did not benefit from the fertilizers applied on coffee. Bean yield of fertilized coffee was increased significantly by 202 percent under fertilized or unfertilized coconuts. But yield of unfertilized coffee did not increase even under fertilized coconut. There is a need to apply fertilizers separately to both crops. Economic analysis revealed that fertilizer application to both coconut and coffee gave the highest net return, followed by fertilizer application on coffee alone.

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Ronga, Domenico, Mario Parisi, Luisa Barbieri, Isabella Lancellotti, Fernanda Andreola e Cristina Bignami. "Valorization of Spent Coffee Grounds, Biochar and other residues to Produce Lightweight Clay Ceramic Aggregates Suitable for Nursery Grapevine Production". Horticulturae 6, n. 4 (23 settembre 2020): 58. http://dx.doi.org/10.3390/horticulturae6040058.

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The valorization of agro-industrial by-products is one of the key strategies to improve agricultural sustainability. In the present study, spent coffee grounds and biochar were used as pore forming agents in the realization of lightweight clay ceramic aggregates that were used as sustainable fertilizers, in addition to tailored glass fertilizer containing phosphorous (P) and potassium (K) and nitrogen (N) synthetic fertilizer, for nursery grapevine production. The obtained fertilizers were assessed in a pot experiment for the fertilization of bare-rooted vines. Unfertilized (T0) and fertilized plants (T1, using NPK-containing commercial fertilizer) were used as controls. Plants fertilized by spent coffee grounds and spent coffee grounds + biochar-containing lightweight aggregates and added with 30 wt% of the above-mentioned glass and N fertilizers (T2 and T3, respectively) recorded higher values of plant height, shoot diameter, leaf and node numbers. Moreover, T2 treatment induced the highest chlorophyll content, shoot and root dry weights. The present study shows that lightweight clay ceramic aggregates containing spent coffee grounds and glass and N fertilizers can be used for nursery grapevine production, in turn improving the agricultural sustainability.

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Pacumbaba, R. P., G. F. Brown e R. O. Pacumbaba. "Effect of Fertilizers and Rates of Application on Incidence of Soybean Diseases in Northern Alabama". Plant Disease 81, n. 12 (dicembre 1997): 1459–60. http://dx.doi.org/10.1094/pdis.1997.81.12.1459.

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Field incidence of soybean stem canker (SSC), Phytophthora root rot (PRR), bacterial blight of soybean (BBS), soybean mosaic virus (SMV), and soybean cyst nematode (SCN) females on soybean cultivar Bragg were compared under complete (20-20-20), ammonium nitrate (34-0-0), superphosphate (0-46-0), and muriate of potash (0-0-60) fertilizers, and rate regimes with unfertilized controls on Decatur silty clay loam (Rhodic paleudult) in northern Alabama. Plants fertilized with muriate of potash had higher incidence of PRR and SMV. Plants fertilized with complete fertilizer had the lowest incidence of PRR and SMV, and the highest yield. Both complete and superphosphate fertilizers lowered the incidence of SMV at application rates from 0 to 100 kg/ha, then increased up to 200 kg/ha. Ammonium nitrate fertilizer had no effect on incidence of SMV. The incidence of BBS and the number of SCN females were not affected by either type of fertilizers or rate of application. Application rates of any of the four fertilizers reduced incidence of SSC. It is recommended to use only complete fertilizer to increase yield and reduce field incidence of PRR, SMV, and SSC.

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Satria, Benni, Syahyan Raesi, Afrima Sari, Armansyah Armansyah, Indra Dwipa, Aprisal Aprisal, Ferry Lismanto Syaiful e Ardi Ardi. "TEKNOLOGI PENGOLAHAN PUPUK ORGANIK PADA KELOMPOK TANI SUNGKAI PERMAI DI KELURAHAN LAMBUNG BUKIK KOTA PADANG". Jurnal Hilirisasi IPTEKS 3, n. 3 (28 settembre 2020): 277–89. http://dx.doi.org/10.25077/jhi.v3i3.438.

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The people of Lambung Bukik Village, Pauh Subdistrict, Padang City, mostly work on horticultural crops, secondary crops, raising cattle, and chickens. Agriculture in this area uses mostly inorganic fertilizers and organic fertilizers. This results in the high need for farmers for inorganic fertilizers. The activity's objectives are 1. to obtain an organic production module by utilizing horticultural agricultural waste, secondary crops, and cow dung, 2. analyzing the organic fertilizer content, 3). obtain organic fertilizer containing high nutrient elements and 4. obtain organic fertilizer derived from organic fertilized waste material with EM4, MOL, and Trichoderma sp. Activities were carried out in the UPPO Sungkai Permai farming community through organic fertilizer processing technology. Participants in this activity are members of farmer groups, community leaders, and accompanied by Andalas University students. The activity methods applied are 1. training and demonstration on the manufacture of organic fertilizers from agricultural waste and cow dung using EM-4, Mol, Trichoderma sp, 2. demonstration of making local microorganisms (MOL), 3. analyzing nutrient elements of organic fertilizers, and 4. a demonstration plot of organic spinach and water spinach using organic fertilizers from three different organizer depupuk, namely: EM4, fruit mole, and a mixture of both. The results achieved were: organic fertilizer processing methods, and quality organic fertilizers with the highest average nutrient content of fruit mole samples (N = 1,823%, P = 1,717%, K = 0.757%, Mg = 0.742, C. organic 27,400 , Organic matter = 47.237, and the highest C / N = 39.645%. The demonstration plot of organic fertilizer from three organic fertilizer samples obtained that the use of fruit moles as organizer depupuk resulted in the best growth and yield of spinach and kale wet weight.

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Mwalongo, Dennis A., Nils H. Haneklaus, Jacob B. Lisuma, Nelson Mpumi, Aloyce I. Amasi, Jerome M. Mwimanzi, Furaha M. Chuma, Thomas T. Kivevele e Kelvin M. Mtei. "Uranium Dissemination with Phosphate Fertilizers Globally: A Systematic Review with Focus on East Africa". Sustainability 16, n. 4 (9 febbraio 2024): 1496. http://dx.doi.org/10.3390/su16041496.

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Growing concern has been expressed about uranium (U) accumulation in agricultural soils caused by the long-term application of mineral fertilizers. More than 80% of naturally occurring U transfers from phosphate rock (PR), the raw material used in mineral fertilizer production, to phosphorus (P) fertilizers. These fertilizers are then distributed on agricultural soils, where the U could accumulate over time and become a risk to the environment. The objective of this work was to review the reported content of U in P fertilizers, its potential dispersion in soils, and its uptake by plants in different countries in the world as reported in the literature. The articles for this systematic review were selected from the Scopus database published between 2003 and 2022. The preferred reporting items for systematic reviews and meta-analyses (PRISMA) protocol were used. A total of 54 articles were assessed based on the standard inclusion and exclusion criteria. U concentrations in P fertilizers, agricultural soil dissemination, and plant uptake for available data were obtained and assessed. In order to compare a set of related data from the collected articles, box and whisker plots showing the distribution of U in P fertilizers are presented by region. The results from the reviewed articles show that the U concentrations in P fertilizer were in the range of 0.1–653 mg kg−1. Interestingly, Minjingu P fertilizers from Tanzania, which are used in six East African countries, showed the highest U concentrations (159 to 653 mg kg−1, average 390 mg kg−1). The reported U concentrations for these fertilizers are, in fact, comparable to those of conventional low-grade uranium deposits mined in Namibia and elsewhere. Additionally, approximately 96% of the reviewed articles indicate that fertilized soil has higher U concentrations than non-fertilized soils, hinting at a measurable effect of mineral fertilizer use. The review recommends U extraction during mineral fertilizer production so that potential environmental risks can be reduced and U resources that would otherwise be lost can be recovered and used to substitute conventional U mining elsewhere.

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Eaton, Touria E., Douglas A. Cox e Allen V. Barker. "Sustainable Production of Marigold and Calibrachoa with Organic Fertilizers". HortScience 48, n. 5 (maggio 2013): 637–44. http://dx.doi.org/10.21273/hortsci.48.5.637.

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Experiments were conducted to evaluate organic fertilizers in production of greenhouse-grown calibrachoa (Calibrachoa ×hybrida Llave & Lex) and marigold (Tagetes erecta L.) and nitrogen (N) leaching from containers during production. Calibrachoa was grown with five fertilizer treatments: one chemical, one organic-based, and three organic (liquid fish, oilseed extract, and a combination of oilseed extract and liquid fish). Marigold was grown with seven fertilizer treatments: one chemical and three organic (liquid fish, oilseed extract, and alfalfa pellets) used either alone or in combination. Chemical or organic-based fertilizers produced the best quality calibrachoa based on plant appearance and size. Liquid fish fertilizer produced healthy plants but smaller plants than those grown with chemical or organic-based fertilizers. Plants grown with oilseed extract were stunted and showed chlorosis. If oilseed extract was combined with liquid fish, the plants were similar to those grown with the chemical or organic-based fertilizers in size and quality. Chemical or liquid fish fertilizers produced the highest quality marigold based on plant appearance. Plants fertilized with alfalfa pellets were sparse and pale green. Oilseed extract produced the poorest growth and quality. If oilseed extract was combined with liquid fish or alfalfa, marigold plants were close in size and development to chemical-fertilized plants without nutrient deficiency and with some enhancement of nutrient levels in the leaves. The combination of alfalfa and liquid fish produced similar results. The highest N leaching resulted from plants fertilized by liquid fish, mostly in the form of ammonium nitrogen (NH4-N). Combining liquid fish with alfalfa or oilseed extract reduced the amount of N leached from the pots. The results suggest that organic fertilizers can be used successfully to grow commercial greenhouse crops but should be combined for good plant quality and environmental sustainability.

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Più fonti

Tesi sul tema "Fertilizers"

Knowles, Tim C., Paul Artz e Chip Sherrill. "Preplant Micronutrient Fertilizers for Cotton". College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/197269.

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Micronutrient fertilizers including zinc, boron, copper, and manganese in their sulfate forms were broadcast applied and incorporated preplant to determine their effects on lint yield of upland cotton.

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Xie, Rongjing. "Animal manures and urea as nitrogen sources for corn production in Québec". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64482.

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Fathi, Ghodratollah. "Nitrogen responsiveness in barley". Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phf2524.pdf.

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Fan, Mingxiang. "Urea and acidic phosphate interactions in fertilizer microsites and their effect on corn (Zea mays L.) yield and nutrient use efficiency". Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41334.

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Fertilizer applications of urea and triple superphosphate (TSP) suffer from low efficiency for corn production. Band or broadcast application of urea with acidic-P fertilizers may increase fertilizer efficiency. Urea and acidic-P fertilizer interactions in soil-fertilizer microsites were investigated using two Quebec soils. Adding acidic phosphates such as TSP and monoammonium phosphate (MAP) to urea reduced pH in microsites, urea hydrolysis, NH$ sb3$ volatilization, and increased soil NH$ sb4$- and NO$ sb3$-N contents. Ammonia loss decreased as P$ rm sb2O sb5$: urea-N ratios increased. Adding urea to P fertilizer increased soil pH and P sorption when using CaCl$ sb2$ as the electrolyte. Urea application increased 0.5 M NaHCO$ sb3$ extractable P. Banding urea with TSP caused dissolution of organic matter in soils, and increased P diffusion and P concentration in soil solution sampled with filter paper or in 1 M KCl extraction. Two years of field experiments demonstrated that banding urea with TSP or MAP increased soil extractable P (Mehlich-3), N and P nutrient uptake, plant growth and development of corn. Greater P fertilizer efficiencies and higher yields were achieved by banding urea-acidic P fertilizers.

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Smith, Leslie Owen 1960. "Effect of broadcast phosphorus on alfalfa yield and quality". Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/558068.

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Rafle, Abdirashid Dulane 1961. "NITRATE-NITROGEN AND TOTAL NITROGEN CONCENTRATION IN GRAIN SORGHUM (SORGHUM BICOLOR (L.) MOENCH) AS RELATED TO NITROGEN FERTILIZATION". Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/291249.

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Silva, Marciela Rodrigues da. "Modelo determinístico para estimação da adubação nitrogenada na cultura do milho para grãos e silagem". Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/221.

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Com o objetivo de avaliar a necessidade de adubação nitrogenada para a produção de grãos e silagem e um modelo matemático de estimação da produtividade potencial e deplecionada na cultura do milho, foi conduzido um experimento utilizando quatro híbridos de milho (AG30A86, AGN20A55, CD308 e AG30A91)avaliados em oito níveis de adubação nitrogenada. O experimento foi realizado na Universidade Tecnológica Federal do Paraná – PR e o delineamento experimental utilizado foi o de blocos ao acaso com parcelas subdivididas, sendo as doses de N (0, 60, 120, 180, 240, 300, 360 e 420 kg ha-1) aplicadas nas parcelas principais e os genótipos semeados nas subparcelas. As variáveis analisadas no experimento a foram: o índice de área foliar, as características fitotécnicas, os componentes do rendimento, a exportação de nutrientes e os caracteres bromatológicos dos genótipos de milho destinados a produção de grãos e silagem. Em relação ao modelo matemático, as estimativas de produtividade potencial e deplecionada de grãos e silagem de milho, basearam-se nos valores diários de temperatura, insolação, radiação solar, pressão atmosférica e precipitação, para o município de Dois Vizinhos – Paraná. As simulações foram realizadas inicialmente utilizando-se um modelo matemático baseado em modelos e informações da literatura (1) e em seguida, propôs-se um modelo alternativo (2), por meio da alteração dos parâmetros de índice de área foliar, graus dia para o florescimento e número de plantas por metro linear, obtidos no experimento realizado. Os dados simulados foram avaliados por intermédio do coeficiente de correlação de Pearson, índice de concordância de Willmott, desvio padrão, quadrado médio do erro e índice de desempenho de Camargo. Em função dos resultados obtidos pode-se concluir que: a adubação nitrogenada altera as características agronômicas e romatológicas avaliadas nos diferentes cultivares. A produtividade de matéria seca da silagem não foi influenciada pelas doses de nitrogênio, porém a produção de grãos foi alterada, sendo a máxima eficiência técnica para a produtividade de grãos (13.059 kg ha-1) obtida com a dose de 146 kg de N ha-1. O modelo alternativo, calibrado com dados experimentais, pode ser utilizado na simulação das produtividades de grãos e silagem da cultura do milho, assim como para estimar as exigências em nitrogênio para a produção de grãos, apresentando maior eficiência e precisão, em relação ao modelo da literatura. No entanto, as estimativas de requerimento de nitrogênio devem sofrer ajustes para adequar o modelo aos dados verificados.
In order to assess the need for nitrogen fertilizer to produce grain and silage and a mathematical model for estimating potential productivity and depleted in the corn crop, an experiment was conducted using four corn hybrids (AG30A86, AGN20A55, CD308 and AG30A91 ) evaluated at eight levels of nitrogen fertilization. The experiment was conducted at the Universidade Tecnológica Federal do Paraná - PR and the experimental design used was randomized blocks with split plots and N levels (0, 60, 120, 180, 240, 300, 360 and 420 kg ha-1) applied in main plots and subplots seeded genotypes. The variables analyzed in the field experiment were: leaf area index,the characteristics of agronomic parameters, yield components, the export of nutrients and bromatological characters of maize genotypes for grain yield and silage. Regarding the mathematical model, estimates of potential productivity and depleted grain and corn silage, were based on the daily values of temperature, solar radiation, solar radiation, atmospheric pressure and precipitation for the city of Dois Vizinhos - Paraná. The simulations were performed initially using a mathematical model based on models and literature information and then it was proposed an alternative model, by changing the parameters of leaf area index, degree days to flowering and number of plants per meter, obtained in the experiment. The simulated data were evaluated by means of the Pearson correlation coefficient, index by agreement of Willmott, standard deviation, mean square error performance index and Camargo. According on the results obtained it can be concluded that: nitrogen fertilization alter the agronomic characteristics and bromatological evaluated in different cultivars. The dry matter yield of silage was not affected by nitrogen levels, but grain production was influenced, and the maximum technical efficiency for grain yield (13059.30 kg ha-1) was obtained with a dose of 146.12 kg N ha-1. The alternative model, calibrated with experimental data can be used in the simulation of grain and silage yields of maize, as well as to estimate the nitrogen requirements for the production of grains, with greater efficiency and accuracy, compared to the usual model of the literature. However, estimates of nitrogen application should be adjusted to fit the model to actual data.

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Fleming, Nigel Kevin. "Polyphosphates and microbial uptake of phosphorus : studies with soil and solution culture". Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09A/09af598.pdf.

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Badra, Abdo. "Effects of potassium, magnesium, and sulfur fertilization on corn grain and silage yields in a high nutrient soil". Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60449.

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The effects of added potassium, K, magnesium, Mg and sulfur, S on corn grain and silage yields were investigated in the field for two years.
Due to high nutrient soil, K, Mg and S had no effects on corn grain and silage yields. However, there were trends observed in the treatment effects that were significant. Added K at 240 kg K$ sb2$O/ha increased grain yield over zero kg K$ sb2$O/ha in 1983 and Mg at 60 kg/ha increased grain yield over 30 kg/ha in 1984. In silage, 240 kg K$ sb2$O/ha increased yield over 120 and zero kg K$ sb2$O/ha in 1984. Although there was no K by Mg interaction, there was a need for added Mg to achieve higher yields.
The cumulative effect of fertilizer S at 50 kg/ha significantly reduced silage yield in 1984 over zero S treatment indicating that fertilizer S was unnecessary for corn growth by reason of high levels of soil S and sufficient S provided from precipitation and air dry deposition. S had no interaction with K and Mg because there was no need for fertilizer S to increase yields.
The antagonistic association between K and Mg was seen at the seedling, tasseling and silking stages.
There was an indication of a K by S interaction which was expressed at different stages of growth, but this effect was not evident for dry matter yields.

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Campbell, Clayton Marshall Fulton John Patrick Zech Wesley C. "Evaluating spinner-disc technology for the distribution of poultry litter". Auburn, Ala, 2009. http://hdl.handle.net/10415/1581.

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Libri sul tema "Fertilizers"

Institution, British Standards. Fertilizers. London: BSI, 1988.

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United States International Trade Commission. Office of Industries, a cura di. Fertilizers. Washington, DC: U.S. International Trade Commission, Office of Industries, 1998.

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Canada. Industry, Science and Technology Canada. Fertilizers. Ottawa, Ont: Industry, Science and Technology Canada, 1991.

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Balisacan, A. M. Fertilizers and fertilizer policies in Phillipine agricultural development. College, Laguna: UPLB Agricultural Policy Research Program, 1990.

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United States International Trade Commission. Urea from the German Democratic Republic, Romania, and the Union of the Soviet Socialist Republics: Determinations of the Commission in investigations nos. 731-TA-338 through 340 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, DC: U.S. International Trade Commission, 1986.

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Sharpe, C. R. Registered fertilizers, 1990-1993. [South Perth, W.A.]: Information Branch, Dept. of Agriculture, 1991.

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Marketing Strategies for Industry (UK) Ltd. Fertilizers, UK. Mitcham: MSI, 1985.

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(Firm), W. A. Freeman. Freeman's fertilizers. Hamilton [Ont.]: Howell Lith Co., 1994.

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Tandon, H. L. S. Fertilizers in Indian agriculture: Past, present, and future, 1950-2000. New Delhi, India: Fertiliser Development and Consultation Organisation, 1990.

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Ariga, Joshua. Factors driving the growth in fertilizer consumption in Kenya, 1990-2005: Sustaining the momentum in Kenya and lessons for broader replicability in sub-Saharan Africa. Nairobi, Kenya: Tegemeo Institute of Agricultural Policy and Development, 2008.

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Capitoli di libri sul tema "Fertilizers"

Kihara, Job, Mateete Bekunda, Vimbayi Chimonyo, Anthony Kimaro, Bekele Kotu, Stephen Lyimo e Wezi Mhango. "Management of soil fertility through application of fertilizers." In Sustainable agricultural intensification: a handbook for practitioners in East and Southern Africa, 48–61. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781800621602.0004.

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Abstract This chapter presents technologies for replacing the nutrients lost from cropped fields with external fertilizer sources in a manner that minimizes the consequences of too little or too much application. The technology of using industrial fertilizers, organic fertilizers, and application of farmyard manure and compost alone or in combination with industrial fertilizers are discussed in detail.

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Hoffmeister, George. "Fertilizers". In Riegel’s Handbook of Industrial Chemistry, 367–407. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4757-6431-4_11.

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Fox, Malcolm A. "Fertilizers". In Glossary for the Worldwide Transportation of Dangerous Goods and Hazardous Materials, 88–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-11890-0_30.

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Chenier, Philip J. "Fertilizers". In Survey of Industrial Chemistry, 389–97. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0603-4_21.

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Hoffmeister, George. "Fertilizers". In Riegel’s Handbook of Industrial Chemistry, 367–407. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-7691-0_11.

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Delgado, Antonio, Miguel Quemada e Francisco J. Villalobos. "Fertilizers". In Principles of Agronomy for Sustainable Agriculture, 321–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46116-8_23.

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Soman, P. "Fertilizers". In Fertigation, 25–39. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003245520-5.

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Mortvedt, J. J., e R. J. Gilkes. "Zinc Fertilizers". In Zinc in Soils and Plants, 33–44. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-0878-2_3.

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Hignett, Travis P. "Potash Fertilizers". In Fertilizer Manual, 225–47. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-017-1538-6_18.

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Hignett, Travis P. "Compound Fertilizers". In Fertilizer Manual, 248–69. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-017-1538-6_19.

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Atti di convegni sul tema "Fertilizers"

Zornić, Vladimir, Mirjana Petrović, Snežana Anđelković, Snežana Babić, Dejan Sokolović, Zoran Lugić e Jordan Marković. "UTICAJ MINERALNIH ĐUBRIVA NA FLORISTIČKI SASTAV I PRINOS TRAVNE ZAJEDNICE „FESTUCO-NARDETUM STRICTAE SUBALPINUM“". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.137z.

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This study was aimed to investigate influence of different doses of mineral fertilizers addition on grassland community type Festuco-Nardetum strictae subalpinum. In the course of the study influence of the following fertilized treatments: control, N60P60K60; N90P60K60; N120P60K60 on floristic composition and dry matter yield was investigated. The obtained results suggested that grasses percent increased, while forbs percent decreased in all fertilizer treatments. Grassland quality index and dry matter yield were increased by application of mineral fertilizers in both years of study.

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Bivainis, Vaidas, Egle Jotautiene, Ramunas Mieldazys e Grazvydas Juodisius. "Simulation research on properties of spherical manure granules". In 23rd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2024. http://dx.doi.org/10.22616/erdev.2024.23.tf034.

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To increase the effectiveness of fertilizers, fertilization technologies are constantly being improved, the quality of fertilizers is improved, and optimal application rates are selected. To protect the soil and the surrounding environment, even organic fertilizers must be spread on the soil following agro-technical requirements. The uniform distribution of organic granular fertilizers in the soil is complicated due to their different physical-mechanical properties and the shape of the granules, compared to mineral fertilizers. Experimental studies are constantly being conducted to determine the properties of granular organic manure fertilizers, but these studies are time-consuming and some require special, expensive equipment. Modern engineering modelling programs simulate the properties of granular fertilizers and allow significantly expand the limits of experiments. The simulation of their properties can be done faster, and the results are sufficiently accurate, having an experimentally verified digital model of organic fertilizers. The purpose of this research is to investigate the effect of properties of spherical granular organic fertilizers in poultry manure spreading using the discrete element Altair EDEM simulation program. Simulation studies were carried out on spherical organic fertilizer bulk density, static and dynamic collapse angles, and static and dynamic friction coefficients of granules. The obtained results showed that the bulk density of the sphere-shaped organic manure granules was higher, the angles of collapse and the pile were slightly smaller and the coefficients of friction were higher, compared to the cylindrical organic fertilizers made from the same manure. These properties have the greatest effect on the uniform spreading of these fertilizers when using centrifugal fertilizer spreaders, so when using spherical fertilizers, they are spread more evenly when spreading sufficiently high rates of fertilizer.

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Yulis Setyawan, Hendrix. "THE POTENTIAL OF PALM WASTE BIOCHAR FOR SLOW RELEASE FERTILIZER". In International conference on Innovation and Technology. JOURNAL OF INNOVATION AND APPLIED TECHNOLOGY, 2021. http://dx.doi.org/10.21776/ub.jiat.2021.se.01.017.

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Charcoal-based fertilizers can be improved in quality by nutrient impregnation and modified to provide nutrients gradually (slow release fertilizer-SRF). SRF fertilizer can be made by using a coating in the form of charcoal from the pyrolysis of palm oil waste. Raw palm oil waste from Bantur District, Malang, East Java, for the soaking process with fertilizers, there are two different types of fertilizers, namely organic (EM4) and inorganic (Urea) fertilizers, after which they are pyrolyzed and the characteristic results are obtained. Based on the research results, waste oil palm has the potential to be developed into a Slow Release Fertilizer. The content of water, ash, and volatile matter was found in the fertilizer which was soaked for 72 hours (3 days), while the bound carbon content was found in the soaking for 72 hours (3 days).

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NIEMIEC, Marcin, Monika TABAK, Łukasz PALUCH e Monika KOMOROWSKA. "ASSESSMENT OF PRODUCTIVE AND ENVIRONMENTAL EFFICIENCY OF SLOW-RELEASE FERTILIZERS IN INTEGRATED PRODUCTION OF NAPA CABBAGE DEPENDING ON APPLICATION METHOD". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.079.

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The study aimed to assess the suitability of slow-release fertilizers in cultivation of napa cabbage in the integrated production system. The objective was realized on the basis of a strict field experiment set up on soil with granulometric composition of light loam. The dose of fertilizer was the first experimental factor, and the fertilizer application was the second factor. The slow-acting fertilizer was applied under each plant during planting of seedlings and in the second variant. The fertilizer was applied in the row, about 5 cm under the seedling root level. On the basis of the results obtained in the experiments, the indices showing nitrogen fertilization efficiency were calculated Fertilization significantly modified the quantity of obtained yield. In the control, without mineral fertilization, the crop yield was 23.32 Mg · ha-1. The largest yield was 52.27 Mg · ha-1. Larger yields and more advantageous productive and environmental efficiency were obtained in objects with row application of fertilizer. The most advantageous agronomic efficiency and nitrogen recovery efficiency were obtained in the combination of 400 kg · ha-1 of slow-acting fertilizer with traditional supplementary PK fertilizers in the case of point application of fertilizers. In the case of row fertilizer application, it is possible to use 50% more of the fertilizer dose without compromising the quality of the crop. Higher doses of free-acting fertilizers increased the standard deviation of the mass of cabbage, which is not desirable for production. The results show that under conditions of low mineral content in the soil, the slow-acting fertilizers can be used at a low level.

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Cvijanovic, Gorica, Eltreki Abduladim, Nenad Đuric, Vojin Đukic, Gordana Dozet, Zlatica Miladinov Mamlic e Asija Abduladim. "UTICAJ PRIMENE NPK ĐUBRIVA I EFEKTIVNIH MIKROORGANIZAMA NA MASU I VISINU BILJAKA SOJE". In SAVETOVANJE o biotehnologiji sa međunarodnim učešćem. University of Kragujeva, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.061c.

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NPK fertilizer and effective micro-organisms have a strong influence on morphological characteristics of soybean plants. In this paper, the influence of NPK fertilizers and effective microorganisms on the weight and height of soybean plants is analyzed. The highest values of the analyzed properties were achieved in the variant with the application of NPK fertilizers in combination with effective organisms, while the individual influence of NPK fertilizers and effective microorganisms was less pronounced.

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Đukic, Vojin, Jegor Miladinovic, Zlatica Miladinov Mamlic, Gordana Dozet, Marija Bajagic, Marijana Jovanovic Todorovic e Vojin Cvijanovic. "PRINOS SOJE U ZAVISNOSTI OD VREMENA PRIMENE NPK ĐUBRIVA". In SAVETOVANJE o biotehnologiji sa međunarodnim učešćem. University of Kragujeva, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.043dj.

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Soybean yield depends on the variety, soil, cultural practices, as well as the weather conditions in certain years. The aim of this research is to examine the impact of NPK fertilizer application in the autumn and spring period on the level of soybean yield. The highest soybean yields were achieved by applying NPK fertilizer in autumn, before the basic tillage with spring application of nitrogen fertilizer AN. Spring application of NPK fertilizers and AN increases the yield, but the effect of fertilizers is significantly less compared to autumn application. The application of nitrogen fertilizer AN increases the soybean yield, and in order for this fertilizer to show its full effect, it is necessary for the soil to be optimally provided with macroelements.

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Karklina, Ilze, Zaiga Anna Zvaigzne e Jelena Stola. "Chemical properties of needles as an indicator of nutrient status of fertilized coniferous stands". In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.012.

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Enhanced forest growth may respond to demand of woody resources and contribute to the climate change mitigation. Forest soil treatment with fertilizers, as well as drainage and thinning enhance forest growth. The analysis of needles is an established method in forest science to identify the nutrient status in the forest stand and need for forest soil enrichment with fertilizers. The aim of this research is to estimate the efficiency of forest soil enrichment with wood ash and ammonium nitrate in order to eliminate nutrient deficiency in forest stands. Forest soil was enriched with wood ash fertilizer or ammonium nitrate in 2016–2017. The current year needles were collected from fertilized and control plots, from three trees in each plot. The samples were collected in the period 2018–2019. Total nitrogen (g kg-1), calcium (g kg-1), magnesium (g kg-1), and potassium (g kg-1) were analyzed in the collected samples. The chemical properties of collected needles were compared at the individual object level to estimate the impact of fertilizer on forest stand. A statistically significant increase in the concentrations of potassium and phosphorus was detected in some plots treated with wood ash and ammonium nitrate. In addition, a correlation analysis conducted between the variables of chemical properties of needles and soil showed few significant correlations between nutrient content in needles and in soil samples.

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Khomych, Serhiі, Igor Tsiz, Victor Tarasyuk e Roman Khlopetscyi. "Development of method and study of granular fertilizer production process based on sapropel". In 23rd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2024. http://dx.doi.org/10.22616/erdev.2024.23.tf070.

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Considering the prospects of using organic sapropel as a raw material for fertilizers in agriculture, particularly in organic farming, its processing becomes an extremely important step. Traditional organic fertilizers, such as manure, are produced virtually untreated using a fairly simple technology, and their quantity is limited by the number of animals. The quality of sapropel-based fertilizers depends on the content of the organic part, the processing method, and the characteristics of the deposit. An analysis of the existing research has shown that sapropel-based fertilizers can be single-component and multi-component. In addition, the content of organic matter in such fertilizers varies widely. Many studies have been devoted to the production of granular sapropel fertilizers and the processes of forming and drying independent particles of arbitrary size and shape, the formation of large balls and strands by pressing, the formation of particles in the form of plates, cylinders, etc. But, given the design features of bulk fertilizer machines, it is necessary to strive for the formation of granules in the form of a ball. The paper proposes directions for the use of sapropel in the production of single-component and multicomponent granular fertilizers. The design of machines for the production of granular sapropel fertilizers in the form of balls with an equivalent diameter of 2-6 mm is presented. The results of experimental studies on the strength, fractional composition, volume, and unit density of granules produced in laboratory conditions are also presented. The obtained results demonstrate the feasibility of implementing the development in production conditions and suggest directions for improvement.

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Lato, Alina, Isidora Radulov, Adina Berbecea, Alina Neacsu e Iaroslav Lato. "UREA FERTILIZERS EFFICIENCY UPON QUALITY PARAMETERS OF WINTER CROPS". In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/6.2/s25.45.

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Nowadays, wheat is the most important food source worldwide and rapeseed has become one of the alternative sources of energy, that is, biofuel. In the current global economic context, the practice of intensive farming, by applying large amounts of fertilizers is no longer sustained, mostly because of the negative environmental impact and also because of the high prices of fertilizers. It is imperatively necessary to practice an efficient management of nitrogen fertilizer, in order to avoid both environmental and economic negative consequences in the future years. The cereals, as wheat and oil crops, as rapeseed are characterized from the point of view of quality parameters by their content in protein and oil. These two important quality parameters are strongly related by the nitrogen fertilization level, soil type, but also by the climate conditions during the vegetation period. The three experimental fields are located in the Banat Plain, in Western Romania, on different soil types having various fertility properties. The experiment is based on studying the effect of different urea fertilizers: with nitrification inhibitor and urease inhibitor versus classic urea, in different amounts. The conclusion reached is that the most efficient nitrogen fertilizer for wheat and rapeseed crops, was nitrification inhibitor urea.

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Kozlovskaya, V. F. "Prospects for the rhizosphere microorganisms integration into agricultural practice as biofertilizers". In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-141.

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Chemical fertilizers are a quick way to increase nutrients in the soil, but their use is economically costly and dangerous for the environment. Plant Growth Promoting Bacteria (PGPB) are able to increase the bioavailability of fertilizers through biological nitrogen (N) fixation, as well as potassium (K), phosphorus (P), and zinc (Zn) solubilization. The enhanced amount of soluble macro- and microelements in the close proximity of soil-root interface increases the fertilizer use efficiency ~ by 20-40 %.

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Rapporti di organizzazioni sul tema "Fertilizers"

Eldridge, J. E., D. T. Tsui, D. R. Mattie, J. Crown, R. Scott e T. Blackman. Perchlorate in Fertilizers. Fort Belvoir, VA: Defense Technical Information Center, settembre 1999. http://dx.doi.org/10.21236/ada453156.

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Berry, J. T., e M. H. Montgomery. Commercial fertilizers 1993. Office of Scientific and Technical Information (OSTI), dicembre 1993. http://dx.doi.org/10.2172/10190390.

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Berry, J. T. Commercial Fertilizers 1994. Office of Scientific and Technical Information (OSTI), dicembre 1994. http://dx.doi.org/10.2172/237429.

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Mishra, Ashok K., Harold Glenn A. Valera, Takashi Yamano e Valerien O. Pede. The Russian Invasion of Ukraine, Fertilizer Prices, and Food Security: Evidence from Rice-Producing Economies in Asia. Asian Development Bank, aprile 2024. http://dx.doi.org/10.22617/wps240233-2.

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Rice is a valuable crop for more than four billion people worldwide. Asia is the world’s leading rice producer. Rice cultivation depends largely on fertilizer use. The Russian invasion of Ukraine has led to a shortage of fertilizers and increased prices. The major rice-producing economies could therefore face a decline in output and higher rice prices. This study assesses the impact of higher fertilizer prices on rice production, consumption, trade and prices, and discusses the implications for major rice-producing economies in Asia.

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Strey, Daniel J., e Nick E. Christians. Comparison of Polymer-coated Urea Fertilizers. Ames: Iowa State University, Digital Repository, 2014. http://dx.doi.org/10.31274/farmprogressreports-180814-883.

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Junhua Jiang e Ted Aulich. JV Task-121 Electrochemical Synthesis of Nitrogen Fertilizers. Office of Scientific and Technical Information (OSTI), novembre 2008. http://dx.doi.org/10.2172/989408.

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Dudkin, I. V., e T. A. Dudkina. Weediness of crops at use of mineral fertilizers. Курская государственная сельскохозяйственная академия, 2018. http://dx.doi.org/10.18411/issn1997-0749.2018-03-14-20.

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Brockhoff, Shane R., Nick E. Christians e Paul Summer. Iowa Produced Amino Acid Fertilizers May Have Biostimulant Effect. Ames: Iowa State University, Digital Repository, 2010. http://dx.doi.org/10.31274/farmprogressreports-180814-2721.

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Garzanov, A. L., O. A. Dorofeeva, A. Iu Briukhanov, M. B. Pavlov e A. V. Filonidov. Granular organomineral fertilizers from animal waste: opportunities and prospects. Farm News, 2018. http://dx.doi.org/10.18411/0131-5226-2018-11978.

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Bhat, M. G., B. C. English, A. F. Turhollow e H. O. Nyangito. Energy in synthetic fertilizers and pesticides: Revisited. Final project report. Office of Scientific and Technical Information (OSTI), gennaio 1994. http://dx.doi.org/10.2172/10120269.

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