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Permanent Pasture Compared with a 5-year Crop-and-pasture Rotation for Dairy Cattle Feed
Joseph Benjamin Shepherd
出版U.S. Department of Agriculture, 1956
URLhttp://books.google.com.hk/books?id=J7UXAAAAYAAJ&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN
註釋This document presents results for an experiment begun in 1944 at Beltsville, Maryland. By 1946, the 5-year rotation was in full operation. This experiment was designed to measure the nature, quantity, and distribution of the nutrients provided for dairy-cattle feed by an improved Kentucky bluegrass-white clover pasture as compared with a 5-year crop-and-pasture rotation consisting of 1 year of corn, 1 year of wheat, and 3 years of a seeded mixture of orchardgrass, Ladino clover, and red clover. The relative cost of producing these nutrients by the two systems was also examined.