Genetic Differentiation Research on Populations of Wild Soybeans in Different Scales Effects of dimethyl disulfide on microbial communities in protectorate soils under continuous cropping Effects of urbanization on indigenous plant diversity: a case study of Langfang City, China Analysis of Factors Influencing the Genetic Diversity Evaluation Using Two Soybean[Glycine max(L.)Merr.] Collections from Hunan and Hubei