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

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 journal › Conference article › peer-review

Abstract

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 language	English (US)
Pages (from-to)	725-730
Number of pages	6
Journal	ASAE Publication
Issue number	4-90
State	Published - Dec 1 1990
Event	Proceedings of the Third National Irrigation Symposium held in conjunction with the 11th Annual International Irrigation Exposition - Phoenix, AZ, USA Duration: Oct 28 1990 → Nov 1 1990

ASJC Scopus subject areas

Engineering(all)

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@article{d50b88f9030a4647a8d0acf73dc8a43d,

title = "Evaluation and comparison of crop water stress index models for irrigation scheduling of Bermuda grass turf",

abstract = "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.",

author = "Slack, {D. C.} and Kopec, {D. M.} and Brown, {P. W.} and Matthias, {A. D.} and Jalali-Farahani, {H. R.}",

year = "1990",

month = dec,

day = "1",

language = "English (US)",

pages = "725--730",

journal = "ASAE Publication",

issn = "0197-1662",

number = "4-90",

note = "Proceedings of the Third National Irrigation Symposium held in conjunction with the 11th Annual International Irrigation Exposition ; Conference date: 28-10-1990 Through 01-11-1990",

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TY - JOUR

T1 - Evaluation and comparison of crop water stress index models for irrigation scheduling of Bermuda grass turf

AU - Slack, D. C.

AU - Kopec, D. M.

AU - Brown, P. W.

AU - Matthias, A. D.

AU - Jalali-Farahani, H. R.

PY - 1990/12/1

Y1 - 1990/12/1

N2 - 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.

AB - 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.

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AN - SCOPUS:0025529999

SP - 725

EP - 730

JO - ASAE Publication

JF - ASAE Publication

SN - 0197-1662

IS - 4-90

T2 - Proceedings of the Third National Irrigation Symposium held in conjunction with the 11th Annual International Irrigation Exposition

Y2 - 28 October 1990 through 1 November 1990

ER -