1[1] Robert P C. Precision Agriculture: An Information Revolution in Agriculture, Agriculture Outlook Forum 1999.1～5.
2[2] Robert P C, Rust R H, Larson W E. Preface. Proc-eedings of The 3rd International Conference on Precision Agriculture, 1996, pxvii.
3[3] Akridge J T, Whipker L D. Precision Agricultural Se-rvices and Enhanced Seed Dealership Survey Results. Center for Agricultural Business. Purdue University Staff Paper，1998 No. 98～11.
4[4] Daberkow S G, McBride W D. Adoption of Precision Agriculture Technologies by U.S. Corn Producers. Proceedings of the 4th International Conference on Precision Agriculture, P C Robert et al.(ed.) St. Paul, MN July 19～22, 1998. ASA,CSSA,SSSA: Madison, WI. 1821～1832Z
5[5] Robert P C, Rust R H, Larson W E. Preface. Proc-eedings of Site-Specific Management for Agriculture Systems. The 2nd International Conference on Research and Development Issues in Site-Specific Crop Management, 1994, ppⅩⅢ-ⅩⅣ.
6[6] Yield Map Interpretation Basic Principles, Precision Agriculture Center, Dept of Soil, Water and Climate, University of Minnesota, Nov，1997. 1～24.
7[7] Gary L Wagner. Precision Agriculture on the Farm. A W G Farms Inc. Crookston, MN, Aug.5, 1999, 17.
8[1]ELLSBURY M M, CLAY S A, FLEISCHER S J, et al. Use of GIS/GPS systems in IPM[M]. APS Press,2000.419-438.
9[3]BLACKMORE S. The interpretation of trends from multiple yield maps[J].Computers and Electronics in Agriculture, 2000,26:37-51.
10[4]AKRIDGE J T, WHIPKER L D. Precision agricultural services and enhanced seed dealership survey results[J].Center for Agricultural Business Staff Paper, 2000.
