Diurnal and seasonal variation of CWSI with cotton in northeast of Brazil

B. B. da Silva, D. C. Slack

Research output: Contribution to journalConference articlepeer-review


A field experiment was conducted with a cotton crop subjected to two different irrigation treatments. The objective was to evaluate diurnal and seasonal variation of Crop Water Stress Index - CWSI based on the energy balance and its feasibility in irrigation water management. Measurements of canopy and air temperature, net radiation, wind speed, and water vapor pressure were made daily at 9h30 and 13h30, and many diurnal cycles at hourly interval between 6 h to 17 h. Porometric measurements were also used to evaluate the crop resistance. It was concluded that irrigation should be made when the CWSI reaches 0.3.

Original languageEnglish (US)
JournalPaper - American Society of Agricultural Engineers
StatePublished - 1997
EventProceedings of the 1997 ASAE Annual International Meeting. Part 1 (of 3) - Minneapolis, MN, USA
Duration: Aug 10 1997Aug 14 1997

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)


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