2005
DOI: 10.1590/s1415-43662005000200013
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Agregação de Latossolo Vermelho sob diferentes sistemas de preparo do solo, após um único cultivo com girassol

Abstract: Avaliou-se, no presente trabalho, o efeito de um único cultivo de girassol na agregação de Latossolo Vermelho submetidos a diferentes sistemas de preparo, em número de quatro: grade aradora + grade niveladora (GA), grade niveladora (GN), semeadura direta na palha (SP) e plantio direto (PD), no outono-inverno; exceto no PD, foi passado o escarificador + grade niveladora na primavera-verão semeando-se, em seguida, a soja e, no outono-inverno o girassol. As avaliações dos agregados de solo foram feitas antes do p… Show more

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“…Crop sequences involving sunflower and sun hemp show the importance of crop rotation arrangements on soil aggregation, considering different families, diverse root systems, and variable residue input and persistence on soil surface; these factors determine soil quality in no-tillage systems. Deep root systems, for example, accentuate the effect of wet and dry cycles on soil aggregation, improving it (Ungaro et al, 2005). This is the case of sunflower (Asteraceae), which has a tap root system that can reach up to 2-m depth.…”
Section: Resultsmentioning
confidence: 99%
“…Crop sequences involving sunflower and sun hemp show the importance of crop rotation arrangements on soil aggregation, considering different families, diverse root systems, and variable residue input and persistence on soil surface; these factors determine soil quality in no-tillage systems. Deep root systems, for example, accentuate the effect of wet and dry cycles on soil aggregation, improving it (Ungaro et al, 2005). This is the case of sunflower (Asteraceae), which has a tap root system that can reach up to 2-m depth.…”
Section: Resultsmentioning
confidence: 99%