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Enzymes related to ethanol formation and their possible importance in the resistance of maize and sorghum to anoxia.Lee, Thomas Christopher. January 1984 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 184-188).
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Molecular characterization and virulence analysis of Fusarium oxysporum strains used in biological control against Striga hermonthicaVenne, Julien. January 1900 (has links)
Thesis (M.Sc.). / Written for the Dept. of Plant Science. Title from title page of PDF (viewed 2008/12/10). Includes bibliographical references.
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Econometric models of the Argentine cereal economy : a focus on policy simulation analysis /Ben-Belhassen, Boubaker, January 1997 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves 182-185). Also available on the Internet.
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Econometric models of the Argentine cereal economy a focus on policy simulation analysis /Ben-Belhassen, Boubaker, January 1997 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves 182-185). Also available on the Internet.
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Rendimento Agrícola e Atributos do Solo em Sistemas de Produção com Variação de Preparo do Solo e Sucessão de Culturas com Sorgo Forrageiro e Soja no Verão e Milho Solteiro/Consorciado com Braquiária no Inverno / Organic matter, Nitrogen and Potassium under no tillage and conventional system after succession crops in the west São PauloSilva, Paulo Claudeir Gomes da 17 December 2015 (has links)
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Previous issue date: 2015-12-17 / Production systems involving the cultivation of grasses and legumes can significantly change the fertility of the soil as well as soil preparation. Therefore, we carried out an experiment to evaluate the accumulation of organic matter, nitrogen, ammonium, nitrate and potassium in production systems with succession grass/grass and grass/legume. The study was conducted in the field, in Unoeste Experimental farm with several crops: sorghum/ corn single, sorghum/corn intercropped, soybean/corn single and soy/corn intercropped under no tillage and the conventional tillage. The experimental design was a strip block with four replications. Samples were collected in the begin of the experiment in August 2012. The depth collection was 0-20 and 20-40 cm deep. The other samples were collected in February and August of the 2014 and August of the 2015. In this time the depth collection was 0-5, 5-10, 10-20, 20-40 and 40-60 cm. The yields for sorghum, soybeans and corn were evaluated. The total N content and NO3- in the soil increased significantly in the no tillage, with the succession soybean/ corn intercropped with gras. The NH4+ was the highest amount in soybeans /corn in the no tillage system. For nutrient K+ contents were similar in for all the tratments, but the higher concentrations was in soil management under no tillage system. The leaching it occurred to total N, NH4+, K + and NO3-, when the in depth incriased. The highest yield occurred in the single corn grown in the no tillage after soybeans. The soybean crop was better in the succession of single corn under conventional tillage and corn/grass. Under notillage system, sorghum crop the had similar results, but no tillage was higher dry matter yield hectare. / Sistemas de produção envolvendo o plantio de gramíneas e leguminosas podem alterar a fertilidade do solo significativamente, assim como o preparo de solo. Sendo assim, realizou-se um experimento para avaliar o acúmulo de matéria orgânica, nitrogênio total, amônio, nitrato e potássio em sistemas de produção com sucessões gramínea/gramínea e gramínea/leguminosa, sob plantio direto e convencional. O estudo foi realizado a campo, na fazenda experimental da UNOESTE, com inicio em agosto de 2012 e término em agosto de 2015, com as seguintes sucessões de culturas: sorgo/milho solteiro, sorgo/milho com braquiária e soja/milho solteiro e soja/milho com braquiária em sistema de plantio direto (SPD) e sistema de plantio convencional SPC. O delineamento experimental foi faixas com quatro repetições. As amostragens foram realizadas no inicio do experimento agosto de 2012, para caracterização da área, nas camadas de 0-20 e 20-40 cm de profundidade, as demais amostras foram fevereiro, agosto de 2014 e agosto de 2015, a 0-5, 5-10,10-20, 20-40 e 40-60 cm de profundidade. Foram avaliadas as produtividades para sorgo, soja e milho. O teor de N-total e NO3- no solo teve um aumento expressivo no SPD referente ao SPC, com a sucessão da soja/milho-Urochloa, já o NH4+ a maior quantidade foi na sucessão soja/milho no SPD. Para o nutriente K+ os teores encontrados foram semelhantes nas sucessões de culturas adotadas, mas com maiores teores no manejo de solo SPD. A lixiviação ocorreu em profundidade para N-total, NH4+, NO3- e K+. A maior produtividade ocorreu no milho cultivado solteiro no SPD após soja. A cultura da soja foi melhor na sucessão de milho solteiro no SPC e milho/Urochloa no SPD e para cultura do sorgo os sistemas adotados obtiveram resultados semelhantes, sendo SPD com maior produtividade de matéria seca hectare.
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