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Eficácia dos herbicidas no controlo de ervas daninhas na soja (Glycine max L.)
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ISBN10: 6630376536
ISBN13: 9786630376531
Publisher: Edicoes Nosso Conhecimento
Pages: 128
Weight: 0.40
Height: 0.30 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786630376531
Publisher: Edicoes Nosso Conhecimento
Pages: 128
Weight: 0.40
Height: 0.30 Width: 6.00 Depth: 9.00
Language: Portuguese
A segurança alimentar era a principal preocupação até à década de 1960 e, atualmente, a ênfase recai sobre a produção agrÃcola sustentável. As limitações agronómicas do cultivo e manuseamento da soja podem ser minimizadas através do uso de meios mecânicos adequados para a sementeira, o cultivo intercalado, o controlo de ervas daninhas, a colheita e a debulha. Entre essas limitações, a infestação por ervas daninhas na soja constitui um dos principais obstáculos que limitam o seu nÃvel de produtividade. Dependendo do tipo de ervas daninhas, da sua intensidade e do perÃodo em que competem com a cultura, os rendimentos podem ser reduzidos em 20 a 50 por cento quando as ervas daninhas crescem em simultâneo com a cultura durante uma estação prolongada. Os métodos tradicionais de controlo de ervas daninhas, seja por capina manual ou por meios mecânicos, estão agora a tornar-se dispendiosos, tediosos, trabalhosos e demorados. A indisponibilidade de mão-de-obra suficiente na fase crÃtica do crescimento da cultura para a capina manual. Nestas circunstâncias, é inevitável adotar medidas alternativas que ajudem a controlar as ervas daninhas no inÃcio da época e também nos perÃodos crÃticos de competição entre a cultura e as ervas daninhas. A única opção para controlar as ervas daninhas seria através de herbicidas em doses adequadas.
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