GreenSeeker Handheld for Crop Scouting
The GreenSeeker handheld crop sensor is an affordable, easy to use scouting device that can be used to assess the health—or vigor—of a crop. Readings taken by the GreenSeeker handheld can be used to make non-subjective decisions regarding the amount of fertilizer to be applied to a crop, resulting in a more efficient use of fertilizer—a benefit to both a farmer’s bottom line and the environment.
How To Use the Handheld
Hold the sensor over the crop canopy and then pull the trigger.
The sensor’s field of view is an oval; its size increases with the height of the sensor.
The sensor should be 2 – 4 feet about the crop.
When pulling the trigger, the sensor turns on and emits a brief burst of light at two specific wavelengths (red and infrared), and then measures the amount of light reflected back for each. While the trigger remains engaged, the sensor continues to sample the scanned area by generating continuous bursts of light pulses and updating the display.
Green plants absorb most of the red light and reflect most of the infrared light. The relative strength of the detected light is a direct indicator of the density of the foliage in the sensor’s view. The denser and more vigorous the plant, the greater the difference is between the reflected light signals. The sensor displays the measured value on its LCD. NDVI can range from 0.00 to 0.99.