Development of a Nitrogen Application System for Nitrogen Deficiency in Corn

  • Noh, Hyun Kwon (Department of Biosystems Engineering, Chungbuk National University)
  • Received : 2017.05.19
  • Accepted : 2017.05.30
  • Published : 2017.06.01


Purpose: Precision agriculture includes determining the right amount of nitrogen for a specific location in the field. This work focused on developing and validating a model using variable rate nitrogen application based on the estimated SPAD value from the ground-based image sensor. Methods: A variable rate N application based on the decision making system was performed using a sensor-based variable rate nitrogen application system. To validate the nitrogen application decision making system based on the SPAD values, the developed N recommendation was compared with another conventional N recommendation. Results: Sensor-based variable rate nitrogen application was performed. The nitrogen deficiency level was measured using the image sensor system. Then, a variable rate application was run using the decision model and real-ti me control. Conclusions: These results would be useful for nitrogen management of corn in the field. The developed nitrogen application decision making system worked well, when considering the SPAD value estimation.


Supported by : Chungbuk National University


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