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Working with wheat and triticale plant breeders at CIMMYT, Kyle Freeman
demonstrated that NDVI readings could be used for plant selection (top
figure). The use of the sensor to predict biomass was a significant improvement
on the current methods whereby visual scores were made by breeders (see
chart below).
The current NFOA algorithm was field tested in 2001, demonstrating that
grain yields could be increased at lower N rates when N fertilizers were
applied to each 1 square meter based on an in-season estimate of potential
yield and the Response Index.
Work by Dr. Steve Phillips at VPI demonstrated that our INSEY equation
for predicting yield worked at seven sites in Virginia (red squares) similar
to 16 sites (1998-2000) in Oklahoma.
Today, engineering, plant, and, soil scientists at OSU are refining the
technologies being placed on the field-scale variable N rate applicator.
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