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Improving NUE Using Crop Sensing :

“It Takes a Village”. Improving NUE Using Crop Sensing :. Handheld Sensing: Does User Have An Effect?. A Simple Test. Two 30-ft row segments were measured by 4 different users Orientation: 1. E-W 2. N-S Both GreenSeeker (red) and Crop Circle ACS-210 sensors evaluated

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Improving NUE Using Crop Sensing :

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  1. “It Takes a Village” Improving NUE Using Crop Sensing:

  2. Handheld Sensing: Does User Have An Effect?

  3. A Simple Test • Two 30-ft row segments were measured by 4 different users • Orientation: 1. E-W 2. N-S • Both GreenSeeker (red) and Crop Circle ACS-210 sensors evaluated • Replicated 5 times • Corn was at ~ V-9 growth stage

  4. A Simple Test • All users were given the same user instructions: • Hold sensor between 20 and 24 inches above the crop canopy • Keep the sensor centered over the row as much as possible • Keep the sensor level as possible (by eye) • Walk about 1 to 2 miles/hr • Collect data between the flags

  5. a b c d a a b c NDVI

  6. a a a b b b b b NDVI sd

  7. a a b a b b c c Number of Measurements

  8. A Simplier Test • One user repeated the sensor measurements (Crop Circle only) walking in the opposite direction as the initial test.

  9. NDVI a a

  10. Number of Measurements a b

  11. Handheld Sensing: Does User Have An Effect?

  12. Newell R. Kitchen, Kenneth A. Sudduth, Scott DrummondUSDA-ARS, Columbia, MO Peter Scharf, Harlan Palm, and Kent Shannon Univ. of MO, Columbia, MO

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