Abstract
The present research objectived evaluates the influence of different mannering systems of soil in recuperation of its properties. The work was realized on a “Latossolo Vermelho” (Oxisol). The research beggined in 1997/1998 and evaluation was realized in 2002. The experimental design, in the scheme in zone with split split-plot design. The bands were made up by five covers ( Mucuna aterrima, Pennisetum americanum, Crotalaria juncea, Cajanus cajan and uncultived - fallow) and two systems of tillage (no-tillage and conventional tillage), and the last one subdivided with corn ( Zea mays L.), soybean ( Glycine Max (L.) Merrill) and cotton ( Gossypium hirsutum L.) crops. Was evaluated: macroporosity, microporosity, total porosity, bulk density and penetration resistance, in the following depht: 0.00-0.10; 0.10-0.20 e 0.20-0.40m. According to results, the cover plants do not influence physical properties of soil; no-tillage is affecting to best physical properties of soil in the surface layer; Glycine max used in culture successions proper best physical conditions in soil surface; the corn in the succession was the most promiser for recuperation of physical properties in soil depht
Highlights
A busca por elevada produtividade e melhorias nas propriedades físicas, químicas e biológicas do solo faz com que sejam necessários estudos que avaliem diferentes sistema de manejo
Com exceção da profundidade de 0,10-0,20m para todos os tratamentos estudados e do algodão na profundidade de 0,00-0,10m, os valores de macroporosidade encontram-se na faixa considerada ideal (0,10 a 0,16m3 m-3) por Baver et al (1972) e Kiehl (1979) para que haja um bom desenvolvimento das plantas
Sistemas de preparo de solos de cerrado: efeitos nas propriedades físicas e na cultura do milho
Summary
O trabalho foi conduzido na Fazenda de Ensino e Pesquisa da Faculdade de Engenharia de Ilha Solteira - Unesp, localizada no município de Selvíria, Estado do Mato Grosso do Sul, apresentando como coordenadas geográficas 51° 22' de longitude Oeste de Greenwich e 20° 22' de latitude Sul, com altitude de 335 metros. O solo da área em estudo na nomenclatura atual do Sistema
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