2018
DOI: 10.5039/agraria.v13i1a5501
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Efeitos no solo e nas culturas após vinte anos de cultivo convencional e semeadura direta

Abstract: RESUMO:Com a pesquisa se objetivou avaliar atributos do solo e o desempenho de culturas após 20 anos de condução em dois sistemas de manejo em Cambissolo Húmico no sul do Brasil. Avaliaram-se a semeadura direta (SD) e o preparo convencional (PC) nos cultivos de milho (Zea mays), feijão (Phaseolus vulgaris) e soja (Glycine max), em dois anos agrícolas. Amostras de solo foram coletadas em três camadas ao final do segundo cultivo, enquanto as avaliações das características agronômicas de plantas foram feitas ao f… Show more

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Cited by 11 publications
(8 citation statements)
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“…As emphasized by Cruz et al (2003), it takes a minimum time of five years for stabilization of the changes caused by non-revolving soil for chemical attributes, and a similar or longer time for improvement in physical attributes, depending on the textural class. When checking the effects on soil and crops after twenty years of conventional tillage and no-tillage, Brown et al (2018) found that the conventional tillage is detrimental from the structural quality aspect, since the WMD and the clay flocculation degree were lower and the soil density was higher in this management system. The authors also mention that the conventional tillage provides disaggregation of the soil and fractionation of the aggregate into smaller units by the periodic mechanical soil tillage.…”
Section: /8mentioning
confidence: 99%
“…As emphasized by Cruz et al (2003), it takes a minimum time of five years for stabilization of the changes caused by non-revolving soil for chemical attributes, and a similar or longer time for improvement in physical attributes, depending on the textural class. When checking the effects on soil and crops after twenty years of conventional tillage and no-tillage, Brown et al (2018) found that the conventional tillage is detrimental from the structural quality aspect, since the WMD and the clay flocculation degree were lower and the soil density was higher in this management system. The authors also mention that the conventional tillage provides disaggregation of the soil and fractionation of the aggregate into smaller units by the periodic mechanical soil tillage.…”
Section: /8mentioning
confidence: 99%
“…Queiroz-Voltan et al, (2000), constaram que valores de densidade do solo abaixo de 1,5 kg dm -3 , não afetaram o desenvolvimento das cultivares de soja em seu experimento. Reichert et al (2003) consideram 1,55 mg m -3 como densidade crítica para o bom crescimento do sistema radicular em solos de textura média.…”
Section: Introductionunclassified
“…Atributos químicos do solo como o potencial hidrogeniônico (pH), fósforo (P), potássio (K), cálcio (Ca), e magnésio (Mg) podem afetar individual ou conjuntamente a produtividade das culturas. Entretanto, a alta variabilidade espacial e temporal dos solos dá-se também por outros fatores, tais como: textura do solo (ZANÃO JÚNIOR et al, 2010), topografia (OLIVEIRA et al, 2015 e cobertura do solo (BROWN et al, 2018). Dessa forma o manejo adequado da variabilidade espacial de atributos químicos do solo requer profundo entendimento da variabilidade espaço-temporal das propriedades do solo.…”
Section: Introductionunclassified