Evaluation of Resistances for Bermudagrass Turf Crop Water Stress Index Models

Evaluation of the Penman-Monteith-based crop water stress index (CWSI), as a potential indicator of turf irrigation timing, requires reliable estimates of potential (minimum) canopy resistance, r cp , and aerodynamic resistance, r a . This paper compare various methods of estimating r cp and r a for evaluation of water stress of bermudagrass turfgrass (Cynodon dactylon cv. Midiron) in the desert Southwest of the USA. First, two empirical CWSI models were developed using field data collected from well-watered and severely water-stressed turf plots during the 1986 growing season in Tucson, AZ [...]