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Published online 1 January 1968
Published in Agron J 60:23-26 (1968)
© 1968 American Society of Agronomy
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Evapotranspiration Rates for Irrigated Crops at Geneva, New York1

N. H. Peck, M. T. Vittum and G. H. Gibbs2

Evapotranspiration rates for alfalfa and vegetable crops were determined by measuring changes in available soil water, using gypsum blocks placed at depths of 10, 30, and 50 cm. Available soil water was maintained above 50% capacity in the surface 60 cm of soil for the vegetable crops, and for alfalfa after the first cutting was made in June. Each crop was grown in at least 5 years. Maximum daily evapotranspiration rates and the dates that they occurred as calculated from standard quadratic regression equations were: alfalfa, 3.8 mm, July 26; tomatoes, 4.3 mm, July 29; snap beans, 4.3 mm, August 4; cabbage, 4.3 mm, August 16; sweet corn, 4.6 mm, July 31; squash, 4.1 mm, July 31; and peas, 5.3 mm, June 30.

1 Contribution from the Department of Vegetable Crops, New York State Agricultural Experiment Station, Cornell University, Geneva, N. Y. Approved by the Director for publication as Journal Paper No. 1571. This project was supported in part by Hatch Regional Research Funds, as a contributing project of NE-35: Analysis of Northeastern climate variables and their relationships to plant response.

2 Associate Professor, Professor, and Experimentalist, respectively.

Received for publication April 17, 1967.




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Copyright © 1968 by the American Society of Agronomy.