Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/16/2014
Publication Date: 11/3/2014
Citation: Oshaughnessy, S.A., Evett, S.R., Colaizzi, P.D. 2014. Spatial ET field mapping using sensors mounted on a center pivot [abstract] ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 73-2. CDROM.
Technical Abstract: Site-specific irrigation management is becoming more important for improving crop water use efficiency and reducing water wastage, especially as competition for quality water resources increases. Continuous geo-referenced canopy temperature measurements using sensors mounted on a center pivot irrigation system can provide near real-time temporal and spatial estimates of crop water use at the field scale. These estimates are useful in providing decision support for site-specific variable rate irrigation systems. This presentation discusses the relationship between crop water use derived from neutron meter readings, and a soil water balance equation with an integrated crop water stress index (CWSI) calculated over daylight hours for management zones across a center pivot field.