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Spectral Detection of Micronutrient Deficiency in `Bragg' Soybean

^a CSIRO Land and Water, Private Bag, P.O., Wembley 6014, WA, Australia
^b USDA Plant, Soil & Nutrition Lab., Tower Rd., Ithaca, NY 14853 USA
^c Dep. of Soil, Crop & Atmospheric Sciences, Bradfield Hall, Cornell Univ., Ithaca, NY 14853 USA

View larger version (25K): [in a new window]   Fig. 1 Effect of index leaf metal concentration on shoot yield on Day 23 when the supply of (a) Mn, (b) Zn, (c) Cu, and (d) Fe was varied

View larger version (30K): [in a new window]   Fig. 2 A matrix scatter plot of total chlorophyll concentration (Chlt; µg cm-2), the fluorescence measures Fo/Fv and Fo/F5 min, and the reflectance measures R750/R550, R750/R650 (wavelengths in nm), yellowness index (YI), and normalized difference vegetation index (NDVI) showing qualitative relationships among all of the spectral measures and Chlt. Data are from measurements on the index leaf from each harvest from all experiments

View larger version (23K): [in a new window]   Fig. 3 Effect of metal concentration on (a) total chlorophyll concentration, (b) Fo/Fv, (c) yellowness index, and (d) Fo/F5min. Individual data points are plotted