Application of near‐infrared spectroscopy in analysis of soil mineral nutrients

摘要: Abstract The feasibility of using near‐infrared reflectance spectroscopy (NIRS) was investigated for the analysis pH, electrical conductivity (EC), phosphorus (P), sulfur (S), calcium (Ca), magnesium (Mg), sodium (Na), potassium (K), iron (Fe), and manganese (Mn) in 28 Canadian soil samples from three boreholes down to 10 m depth. Field moist were scanned pH EC, air‐dry elements. Calibrations developed between spectral data results obtained by conventional analyses. NIR‐predicted values highly correlated measured methods (r2>0.9) P, Ca, Mg, K, Fe, Mn, almost as (r2>0.8) S Na Results somewhat less successful (r2>0.6), appeared be useful only screening purposes, whereas EC not successfully predicted NIRS this study. It that could a method rapid, non‐dest...