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Comprehensive information on Nitrogen Use Efficiency for cereal crop productionPaul Gangwish, Shelton, NE April 8, 2005
CV-NDVI algorithm tested for winter wheat in Nebraska
Oklahoma State University
Planting Date: October 16, 2004
Sensing Date: April 7, 2005
Number of Days from Planting to Sensing where GDD>0: 66
NDVI NRich Strip: 
NDVI Farmer Practice: 0.49
RI:  1.12
RI adjusted: 1.20
Yield Potential, Farmer Practice (no additional N):  60 bu/ac
Yield Potential with added N fertilization:  71 bu/ac
Recommended Topdress N Rate:  28 lb N/ac

Also see:  Evan Brandes Farm near Central City, NE.

The NDVI-CV algorithm was tested in Shelton, NE and Central City, NE on April 7 and April 8 working with Dr. Dennis Francis, and Dr. Jim Schepers with the USDA-ARS.

Also see:  Evan Brandes (, Central City, NE, April 7, 2005
308 940-0202


Kyle Freeman works into the evening hours near Shelton, NE, using a variable N rate applicator based on NDVI and CV.