2Ryu K S, Pade J S, Kim B J.Evaluation of rapid detemination of phosphorous in soil ]Jy near infrared spectroscopy [ C ]//Pro ceedings of the lOth International Conference, Korean NIR publications,2002:399-403.
3Bogrekci I, Lee W S, Herrera J.Assessment of P concentrations in the Lake Okeechobee drainage basin with spectroscopic re- flectance of VIS and NIR[ C]//ASAE Annual Meeting,2003.
4Bogrekci I, Lee W S.Comparison of Ultraviolet, Visible, and Near Infrared sensing for soil phosphorus[ J]. Biosystems Engi- neering, 2007,96 : 293 -299.
5Mouazen A M, Maleki M R, Baerdemaeker J D, et al.On-line measurement of some selected soil properties using a VIS-NIR sensor [ J ].Soil & Tillage Research. 2007.93, l 3-27.