A field experiment was conducted to verify the effect of soil sterilization with CH 3Br on root and seedling growth of soybean( Glycine max (L.)) in both normal cropping and soybean continuous cropping for three years.The growth of continuous cropped soybean plants was significantly improved after sterilization,as indicated by the increase in root growth,nodule number,plant fresh weight,primary and total root length,and disappearance of cyst of soybean cyst nematode.The growth of normally cropped soybean...