Preceding cultures conditioning corn crop development and soil attributes in no tillage system - DOI: 10.4025/actasciagron.v27i2.1485

Abstract

With the objective of evaluating the covering biomass, the remainder dead covering, some corn agronomic characteristics and soil attributes, an experiment was carried out in the agricultural year of 2002/2003, at UFMS (Universidade Federal de Mato Grosso do Sul, Dourados, State of Mato Grosso do Sul), in a Dystrorthox, using the winter covering cultures: black oat, hairy vetch, oilseed radish and the association among the three species, all preceding the corn crop in no tillage system. The biomass production of hairy vetch was smaller than the others. The remaining dead cover on soil when using black oat was longer. There were no significant differences in corn crop yield under the different covering vegetables. Black oat provided a bigger degree of flocculation to the studied soil. Phosphate and potassium values in soil with the use of black oat showed to be lower. The results indicate some specificities from the used covering crops whose use can be inappropriate as a soil surface source of biomass.