Abstract
The study was conducted to determine the best irrigation frequency and water-yield relationship for dent corn (Zea mays L. indentata) irrigated by furrow irrigation system under semi-arid conditions in 1998 and 1999 at Sanliurfa, Turkey. Water was applied to corn as 100% 90% 80% and 70% of evaporation from Class A Pan corre- sponding to 2-, 4-, 6-, and 8-day irrigation frequencies, respectively. In both the years, maximum grain yield was observed at application of 10% deficit irrigation and 4-day irrigation frequency, while minimum yield was at applica- tion of 30% deficit irrigation and 8-day irrigation frequency. Total water-use efficiency (TWUE), irrigation water-use efficiency (IWUE) and crop response factor (ky) values were determined. Yield characteristics were affected nega- tively by 30% deficit irrigation and 8-day irrigation frequency.
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