EVALUATION OF GRAIN SORGHUM CULTIVAR UNDER DIFFERENT SOIL TILLAGE SYSTEMS AND SOWING DATES IN A LOWLAND SOIL
Abstract
An experiment was carried out to evaluate the development of under three grain sorghum (Sorghum bicolor L. Moench) cultivars, AG 3001, DK 48 and CS 111 and two sowing dates and three different soil tillage systems conventional tillage, no tillage and subsoiling. The experiment was conducted during the 1993/94 growing season at the campus of the Universidade Federal de Santa Maria, in Vacacaf soil unit. The results demonstred that convencional tillage had a higher grain productivity (5729 kg/ha). The cultivar DK 48 and cultivar AG 3001 was the most productive resulted respectely in 5618 kg/ ha and 5547 kg/ha, but did not statisticaly differ under himself . The subsoiling treatment did not affect productivity of grains, but kept higher soil moisture lawer and soil compactation. The different sowing dates did not affect produtivity.
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