A Map-Based System for Variable Rate Liquid Nitrogen Fertilizer Application

doi:10.22092/jaer.2013.100292

Document Type : Research Paper

https://doi.org/10.22092/jaer.2013.100292

Abstract

This research designed, constructed and evaluated a map-based variable rate application system for liquid nitrogen fertilizer. Solenoid valves were used to change nozzle flow using pulse-wide modulation technology. A turbine flow sensor and GPS module were used to measure solenoid valve flow and online system coordination, respectively. The graphical user interface software was designed by Visual Basic 6. This program received online coordination from a GPS module, received fertilizer map data, compared online and map coordinates, specified application order, received sensor output and compared it with optimum data and then applied proportional closed-loop control. To evaluate the system, accuracy and time-delay experiments were carried out with 3 replications. The results showed that the average difference between map data and system flow for open and close-loop controllers were 10.0 and 3.6%, respectively. The maximum time delay was 0.54 s. Results also showed that, at 1% probability, no significant difference was observed between the system flow and nitrogen fertilizer map data.
This research designed, constructed and evaluated a map-based variable rate application system for liquid nitrogen fertilizer. Solenoid valves were used to change nozzle flow using pulse-wide modulation technology. A turbine flow sensor and GPS module were used to measure solenoid valve flow and online system coordination, respectively. The graphical user interface software was designed by Visual Basic 6. This program received online coordination from a GPS module, received fertilizer map data, compared online and map coordinates, specified application order, received sensor output and compared it with optimum data and then applied proportional closed-loop control. To evaluate the system, accuracy and time-delay experiments were carried out with 3 replications. The results showed that the average difference between map data and system flow for open and close-loop controllers were 10.0 and 3.6%, respectively. The maximum time delay was 0.54 s. Results also showed that, at 1% probability, no significant difference was observed between the system flow and nitrogen fertilizer map data.

Keywords

20.1001.1.26454531.1391.13.4.8.7

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Food Engineering Research

A Map-Based System for Variable Rate Liquid Nitrogen Fertilizer Application

References

References

Volume 13, Issue 4 - Serial Number 4
January 0
Pages 97-108

A Map-Based System for Variable Rate Liquid Nitrogen Fertilizer Application

References

References

Volume 13, Issue 4 - Serial Number 4January 0Pages 97-108

Volume 13, Issue 4 - Serial Number 4
January 0
Pages 97-108