Location: Sustainable Water Management ResearchTitle: Evaluation of a decision support system for variable rate irrigation in humid region
|Evett, Steven - Steve|
|ANDRADE, MANUEL - Oak Ridge Institute For Science And Education (ORISE)|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 11/25/2019
Publication Date: N/A
Technical Abstract: Use of variable rate irrigation (VRI) technology has the potential to improve irrigation water use efficiency (IWUE). VRI hardware is commercially available and could possibly be implemented in any center pivot irrigation system. However, practical methods and algorithms for creating VRI prescriptions have become the bottleneck in accelerating the adoption of VRI. An Irrigation Scheduling Supervisory Control and Data Acquisition (ISSCADA) system for VRI was evaluated in a humid region in the Mississippi Delta. The ISSCADA system was used to manage soybeans for two seasons, and scanned the field for canopy temperature and collected soil water data from time domain reflectometers and weather data from a nearby weather station. The ISSCADA system automatically generated VRI prescription maps that included plots managed using soil electrical conductivity (EC)-based VRI prescriptions. Performance of the ISSCADA system was reported by comparing yields and IWUE with soil EC-based VRI management.