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Near-Infrared Reflectance Spectroscopy Analysis of Phosphorus in Sugarcane Leaves

^a Everglades Res. and Educ. Cent., Univ. of Florida, 3200 E. Palm Beach Rd., Belle Glade, FL 33430
^b USDA-ARS Sugarcane Field Stn., 12990 U.S. Highway 441, Canal Point, FL 33438
^c USDA-ARS Quality Assessment Res., 950 College Station Rd., Athens, GA 30605
^d South Florida Water Manage. District, 3301 Gun Club Rd., West Palm Beach, FL 33416

View larger version (12K): [in a new window]   Fig. 1. Relationship between near-infrared reflectance spectroscopy (NIRS)–predicted P and reference chemistry P in sugarcane leaves from local fertilizer rate calibration using simple linear regression.

View larger version (13K): [in a new window]   Fig. 2. Relationship between near-infrared reflectance spectroscopy (NIRS)–predicted P and reference chemistry P in sugarcane leaves from global calibration of fertilizer rate and water table using simple linear regression.

View larger version (13K): [in a new window]   Fig. 3. Relationship between near-infrared reflectance spectroscopy (NIRS)–predicted P and reference chemistry P in sugarcane leaves from global calibration for parents, fertilizer rate, and water table data calculated using Martens Uncertainty regression.