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RT Book, Whole SR Print DC OPAC T1 Precision agriculture in the 21st century : geospatial and information technologies in crop management A1 National Research Council (U.S.). Committee on Assessing Crop Yield: Site-Specific Farming, Information Systems, and Research Opportunities YR 1997 FD 1997 SP xii, 149 p. K1 Precision farming PB National Academy Press PP Washington, D.C. SN 0309058937 LA eng CL DC21:338.1/6 CL LCC:S494.5.P73 NO Includes bibliographical references (p. 120-132) and index NO 書誌ID=BB00230425; NCID=BA37371240; LK [OPAC]https://lib.kitasato-u.ac.jp/opac/opac_details/?lang=0&amode=11&bibid=BB00230425 LK OL 30