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| Registros recuperados: 173 | |
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| VARGAS, M. A. T.; PERES, J. R. R.; SUHET, A. R.. |
| A soja é considerada a maior fonte de proteínas para a alimentação animal e humana e seus subprodutos oferecem grande diversidade de emprego na indústria química. A expansão dessa cultura no Brasil acentou-se a partir de 1973, quando ocorreu uma grande elevação de seu preço no mercado internacional. A sua participação na pauta de exploração tem sido muito expressiva. Em 1979 contribuiu com cerca de 2 bilhões de dólares em divisas. Ocupa atualmente cerca de 20% de área cultivada no País. Nos cerrados, a partir de uma produção pouco expressiva, em 1975, foram colhidos na safra 1979/80 cerca de 1,9 milhão de toneladas de grãos de soja, equivalendo a 12,6% da produção do País. Essa produção representou um aumento de 66% em relação a safra anterior. Como o... |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Adubação nitrogenada; Brasil; Cultivo; Fertilização; Fertilizer; Inoculation; Savanna; Soybean.; Adubação; Cerrado; Fertilizante Nitrogenado; Glycine Max; Grão; Inoculação; Nitrogênio; Produção; Rhizobium Japonicum; Solo.; Soja; Pennisetum; Inoculation methods; Nitrogen fertilizers; Nitrogen; Soil.. |
| Ano: 1982 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547538 |
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| Wanzala, Maria N.; Jayne, Thomas S.; Staatz, John M.; Mugera, Amin W.; Kirimi, Justus; Owuor, Joseph. |
| The paper has several specific objectives. First, it identifies how fertilizer marketing costs and the types of fertilizers used have changed over the course of the liberalization process in Kenya. A second objective is to examine the fertilizer subsector in Kenya with a view to identifying organizational and institutional changes that could improve its performance. Various types of fertilizer supply chains serving farmers in western Kenya are identified, examine the cost structure of these supply chains, identify potential sources of cost reduction in these supply chains, and last, estimate the impact of illustrative scenarios for reducing fertilizer marketing costs on the profitability of maize production in western Kenya. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Food Security; Food Policy; Kenya; Fertilizer; Crop Production/Industries; Q18. |
| Ano: 2001 |
URL: http://purl.umn.edu/55150 |
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| Nascimento,Fábio Nunes do; Andrade Júnior,Aderson Soares de; Bastos,Edson Alves; Ribeiro,Valdenir Queiroz; Lopes,Alzeneide da Silva. |
| Abstract: The objective of this work was to evaluate the stalk yield, technological quality parameters, and sugar and alcohol productions in the first sugarcane (Saccharum officinarum) crop cycle, according to the response to N and K2O applications by subsurface drip fertigation. The experiment was carried out in a dystrophic Ultisol, in a randomized complete block design with four replicates. The treatments consisted of a 2X + 2X + 1 incomplete factorial arrangement with the application of 60, 80, 120, 160, and 180 kg ha-1 N and 60, 80, 120, 160, and 180 kg ha-1 K2O. The maximum estimated yield (217.5 Mg ha-1) was obtained with the application of 180 kg ha-1 N and 60 kg ha-1 K2O. Sugar and alcohol productions increased with N application above 120 kg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; Alcohol production; Fertilizer; Irrigation management; Sugarcane juice. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201346 |
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| Ippolito, J.A.; Spokas, K.A.; Novak, J.M.; Lentz, R.D.; Cantrell, K.B.. |
| Biochar is the carbonaceous solid byproduct of the thermochemical conversion of a carbon-bearing organic material, commonly high in cellulose, hemicelluloses, or lignin content, for the purposes of carbon sequestration and storage. More specifically, the thermal conversion process known as pyrolysis occurs when carbon-containing substances are introduced to elevated temperatures in the absence of oxygen at varying residence times, yielding biochar. Several pyrolysis techniques employed to produce biochar differ in the temperature of reaction and residence time in the reactor. Different reactor residence times are described as slow (hours to days), fast (seconds to minutes), and flash (seconds). Fast or flash pyrolysis typically occurs around 500oC with... |
| Tipo: Book Section |
Palavras-chave: Fertility; Soil quality; Fertilizer. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1590/1/1547.pdf |
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| Registros recuperados: 173 | |
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