Semeadura direta versus sistemas de preparo reduzido do solo: efeito na cobertura do solo e no rendimento da cultura.

Abstract

This study was conducted at the Municipality of Santa Teresinha de Itaipú, (PR) in a oxisol (LRe), to evaluate diferents systems of soil management. The no-tillage was compared whith four reduced tillage systems of soil. The soil of cover was significantly reduced for every treatments. The no-tillage yields significantly higher than every the others treatments, but the treatment with the higher brute margin of yield was a scarifying executed by a scarify doted of breaking of clods roll.