Studying the effect of a new tillage system on some yield attributes of sunflower crop (Helianthus annuus. L)

Abstract

The study was conducted during the Autumn season 2021 in one of the fields of the College of Agriculture - University of Basra, Karmat Ali site, in a silty clay soil by using a multi-purpose tillage machine. by split-blocks system according to a completely randomized design of a factorial experiment It included three factors: Three plowing depths (30, 40 and 50 cm), two rotary speeds of the rotary plow blades(250 and 300 rpm-1) give two levels of soil pulverizing, and three distances between the two opener furrows (35, 40 and 45 cm) give three different widths of furrows, And its effect on some yield attributes of sunflower, which included: weight of 1000 seeds, seed yield, percentage and oil yield. The results showed a significant increase in Weight of 1000 seeds, total seeds yield and oil yield, with an increase in the plowing depth from 30 to 50 cm, a low rotational speed of 250 rpm, and an increase in the distance between the boards of opener furrows from 35 to 45 cm.