Evaluation and comparison of crop water stress index models for irrigation scheduling of Bermuda grass turf

D. C. Slack, D. M. Kopec, P. W. Brown, A. D. Matthias, H. R. Jalali-Farahani

Research output: Contribution to journalConference article


A simple two-parameter regression model expressing canopy-air temperature difference for a nonwater-stressed vegetative surface as a function of vapor pressure deficit is used to evaluate an empirical crop-water-stress-index (CWSI) for irrigation scheduling of Bermuda grass turf. The present study compares two threshold CWSIs of 0.20 and 0.40 for initiating irrigation. A third treatment using a 'critical temperature' is also being evaluated. Whenever irrigation is indicated by any of the methods, the treatment lysimeter is irrigated with three liters of water (equivalent to 12.5mm). Soil moisture is monitored with the neutron probe and drainage is collected to complete a water balance.

Original languageEnglish (US)
Pages (from-to)725-730
Number of pages6
JournalASAE Publication
Issue number4-90
StatePublished - Dec 1 1990
EventProceedings of the Third National Irrigation Symposium held in conjunction with the 11th Annual International Irrigation Exposition - Phoenix, AZ, USA
Duration: Oct 28 1990Nov 1 1990


ASJC Scopus subject areas

  • Engineering(all)

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