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Detection of Phosphorus and Nitrogen Deficiencies in Corn Using Spectral Radiance Measurements

^a Dep. of Agronomy, Univ. of Nebraska, Lincoln, NE 68583, currently at USDA-ARS, Northern Grain Insects Res. Lab., 2923 Medary Ave., Brookings, SD 57006
^b Dep. of Agronomy and USDA-ARS, Univ. of Nebraska-Lincoln, Lincoln, NE 68583

View larger version (24K): [in a new window]   Fig. 1. Typical vegetation spectral reflectance curve and corresponding color reflected at each particular wavelength.

View larger version (22K): [in a new window]   Fig. 2. Segment of spectral curve for integrating sphere measurement at the 269 kg N ha-1 rate, 23 June 1997.