5J. Van Bergeijk. PA--Precision Agriculture Dynamic for Accurate Fertilizer Application and Montitoring[J].Journal of Agricultural Engineering research, 2001,80 ( 1): 25-35.
6J.N. Reed, S.J. Miles , AE-Automation and Eme-rging Technologies Automatic MushroomHarve-ster Development .Journal of Agricultural Engineering Research[J].2001,78(1): 15-23.
7Ehsani M R, Upadhyaya S K, Fawcett W R. Feasibility of detecting soil nitrate content using a mid-infrared technique. Transactions of the ASAE,2001,44(6):1931-1940.
8Shibusawa S, Mingzan Li, Sakai K. On-line real-time nir soil sensor. Proceedings of International Conference on Agricultural Engineering (99-ICAE), V -115.
9Rhoades J D,Shouse P J, Alves N A. Determining soil salinity from soil electrical conductivity using different models and estimates. Soil Science Society of America Journal, 1990,54 : 46- 54.
10Wang N, Zhang N, Dowell F E. Design of an optical weed sensor using plant spectral characteristics. Transactionsof the ASAE;2001,44(2):409-419.
