Visible-near infrared( VNIR) diffuse reflectance spectroscopy has low accuracy in estimating soil phosphorus( P) and potassium( K). We used database of 1 582 soil samples from 8 soils to investigate P and K content. All samples were oven dried,ground,and sieved with a 2 mm screen. Each sample was divided into two subsamples. One subsample was tested by chemical method. Another subsample was scanned by an ASD Field Spec Pro FR spectrometer. Data were collected using Field Spec RS3 software. All spectra were ...
【基金】
陕西省国际科技合作重点资助项目(K332021102)
【更新日期】
2015-08-03
【分类号】
S153.6
【正文快照】
Soil Phosphorus and Potassium Estimation Using Visible-near InfraredReflectance Spectroscopy with Direct Orthogonal Signal CorrectionHu Guotian1He Dongjian1Kenneth A Sudduth2(1.College of Mechanical and Electronic Engineering,Northwest A&F University,Yang