Performance and Effects on Soybean Cultivation of Disk Cultivator-Ridger (Part 3)

——Comparison of Weed Burial and Weed Protective Performance with Rotary Cultivators——

Abstract

A weed burial performance comparison and weed protection performance comparisons were carried out between disk cultivator-ridgers (D) and rotary cultivators (Rm, R) in an unplanted field and in five fields planted with soybean. The following results were obtained. (1) The burial rate of mock weeds was 91 % for D and a down-cut rotary cultivator installed with earthing up ridgers (Rm), and 82 % for an up-cut rotary cultivator (R). (2) The inter-row weeds in the D-D plots were 50 % reduced in terms of dry weight and 35 % lower than R-Rm plots, and 45 % lower than R-R plots. (3) The intra-row weeds in the D-D plots were 40 % reduced in terms of dry weight and 45 % lower than those in the R-Rm plots, and 45 % reduced in terms of dry weight and 55 % lower than those in the R-R plots.