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Subsoil Nutrient Levels, Soil Genesis, and Soil Classification in Selected Northeastern (MLRA 102A) South Dakota Soils

Kent Evert Cooley

出版	Plant Science Department, South Dakota State University, 1988
URL	http://books.google.com.hk/books?id=rqV2NwAACAAJ&hl=&source=gbs_api