EFFECT OF SOILTILLAGE SYSTEMS AND CROPROTATION ON CORN YIELD

Abstract

To evaluate the effect of soil tillage systems and crop rotation on com yield an experiment was set up in Passo Fundo, RS, .13razi1, which was monitored over a four-year period. Fiou soil tillage systems — I) no-tillage. during winter and summer seasons, 2) conventional tillage using disk plow and disk harrow, in winter and no-tillage, in summer, 3) conventional tillage using moldboard plow and disk harrow, in winter and no-tillage, in summer, and 4) mini muni tillage, in winter and no-til lage, in summer. — and two crop rotation systems ¡system 1 (wheat/soybean and common vetch/corn) and system II (wheat/soybean, black oats or white oats/soybean, and common vetch/corn)] were compared. An experimental design of blocks at random, with split-plots and three replications, was used. The main plot was formed by soi I tillage systems, while the split-plots consisted of crop rotation systems. The yield of com grown tender to-tillage and minimum tillage was higher than the yield obtained for com grown after conventional tillage using disk or moldboard plow and disk harrow. There were no significant &Tem of crop rotation systems on com yields.