The effects of sowing date, planting density, topdressing compound fertilizer at the early seedling stage, topdressing urea at the late seedling stage on the growth duration and yield of special early maturing spring soybean were studied by the design of orthogonal rotational regression combinatorial design. The results showed that: Growth duration of tested soybean variety was significantly shortened with the delay of sowing date, but was not affected by other treated factors. All the tested factors affected the yield significantly, with the ...