3ROTH G W,BEEGLE D B ,FOX R H,et al. Development of a quick test kit method to measure soil nitrate[J].Commun Soil Sci Plant Anal, 1991,22 (3-4) : 191-200.
4SCHAEFER N L.Evaluation of a hand held reflectometer for rapid quantitative-determination of nitrate[J].Commun Soil Sci Plant Anal, 1986,17(9) :937-951.
5BISCHOFF M ,HIAR A M ,TURCO R F. Evaluation of nitrate analysis using test strips:comparison with two analytical laboratory methods[J]. C ommun Soil Sci Plant Anal, 1996,27 (15-17) :2765-2774.
6HOLDEN N M ,SCHOLEFIELD D. Paper test-strips for rapid-determi nation of nitrate tracer[J].Commun Soil Sci Plant Anal, 1995,26 (11-12) : 1885-1894.
7OSBORNE B G,FEARN T.Near Infrared Spectroscopy in food analysis[M].NY:Longman Scientific&Technical,1988.
8NANNI M R,DEMATTE A M.Spectral Reflectance Methodology in Com-parison to Traditional Soil Analysis[J].Soil Sci Soc Am J,2006,70:393-407.
9BRERETON R G.Chemometrics-Data Analysis for the Laboratory andChemical Plant[M].Chichester:John Wiley and Sons Ltd,2002.
