This study was conducted to investigate the effect of different tillage methods, different levels of previous crop residues and different cultivars of soybean on yield and yield components of this plant. This experiment was conducted in the form of a factorial design with a completely randomized block base with three replications and during the growing season of 1399-1400 in one of the farms of Moghan Agriculture and Industry and Livestock Company located in the northeast of Ardabil province. In this study, two types of tillage systems (conventional and non-tillage) and two levels of wheat crop residues (complete and no residues) on the yield of two types of soybeans (Williams cultivar and L17 cultivar) were evaluated. The results of the effect of the mentioned systems on plant height, number of plants, 1000-seed weight, crop yield, percentage of protein and fat of soybean showed that the type of tillage had the most effect and the amount of residues had the least effect on the mentioned parameters. According to the results of the study of the effect of different tillage systems, the amount of residues and the type of plant planted on the agronomic characteristics of soybean at different levels can be expressed that by planting cultivar L17 cultivar soybean The highest crop yield can be achieved with conventional tillage method and complete amount of previous crop residues.
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