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Effect of Crops and Fertilizer on Soil Nitrogen, Carbon, and Water Content, and on Succeeding Wheat Yields and Quality
C. K. MutchlerE. J. DoeringH. W. SomsenHoward J. Haas
出版Agricultural Research Service, U.S. Department of Agriculture, 1975
URLhttp://books.google.com.hk/books?id=W_9Zf5BT9soC&hl=&source=gbs_api
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