Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the EnvironmentOSU Hand Held Sensor History, 1989-present
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Hand Held Sensor
Sensing NDVI in bermudagrass

early spectrometers used in the field
Early sensors in agriculture sensors used at CIMMYT

Early Sensors NDVI

CIMMYT El Batan, sensors

CIMMYT, Ciudad Obregon, Hand Held

variable gain



First variable N rate applicator
 
CIMMYT, Norman Borlaug, GreenSeeker   VRT applicator, 2004 VRT applicator, CIMMYT
VRT Applicator, CIMMYT