1[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.
2[3]BLACKMORE S. The interpretation of trends from multiple yield maps[J].Computers and Electronics in Agriculture, 2000,26:37-51.
3[4]AKRIDGE J T, WHIPKER L D. Precision agricultural services and enhanced seed dealership survey results[J].Center for Agricultural Business Staff Paper, 2000.