Performance and Effects on Soybean Cultivation of Disk Cultivator-Ridger (Part 4)

——Comparison of Effects on Soil Physical Properties, Growth and Yields of Soybean with Rotary Cultivators——

Abstract

Eleven investigations of soil physical properties and thirteen investigations into the growth and yield of soybean were performed after twice cultivating-ridging using disk cultivator-ridgers (D) and rotary cultivators (Rm, R) in five fields planted with soybean. The following results were obtained. (1) When cultivating-ridging in wet soil conditions, the solid phase rate of the surface layer soil in the D-D plots before soybean harvesting was 0.95 times, that in the R-Rm plots, and 0.98 times in the R-R plots. The moisture content of the above-mentioned soil conditions in the D-D plots was 1.1 times that in the R-Rm plots. (2) For cultivating-ridging in wet soil conditions, the soybean yield in the D-D plots was 15 % higher than that in the R-Rm plots.