Document Type : Original Article
Author
Department of water and soil research, Darab Agricultural Resarch station
Abstract
Heavy crop residue on the soil surface impedes no-till drill performance and subsequent crop production in conservation tillage systems and therefore limit its adoption by farmers. Therefore, a field study was conducted to determine the effects of various residue management methods on no-till drill performance. The experimental design was a randomized complete block in five replications. The residue management systems were in four levels of leaving (T1), removing (T2), chopping (T3) and disking (T4). Factor analysis was used to group and identify the most effective indicators of drill performance. The results showed that various residue management methods had a significant effect on planting depth, the speed of emergence, effective field capacity, and depth uniformity. The minimum planting depth and depth uniformity observed for the T1 treatment in the corn crop. The findings revealed that the speed of emergence and depth uniformity was in the order T2>T3>T1>T4and T2>T3>T4>T1 in the corn crop. The results of factor analysis indicated that speed of emergence, planting depth and uniformity of depth were identified as the most effective indicators for evaluating no-till drill performance indexes.
Keywords
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