Open AccessEvapotranspiration and heat unit requirement of cowpea
Author(s) -
C. S. Patil
Publication year - 2010
Publication title -
mausam
Language(s) - English
Resource type - Journals
ISSN - 0252-9416
DOI - 10.54302/mausam.v61i4.914
Subject(s) - kharif crop , lysimeter , evapotranspiration , sowing , crop coefficient , mathematics , crop , environmental science , agronomy , hydrology (agriculture) , soil science , biology , soil water , ecology , geotechnical engineering , engineering
Weighing gravimetric lysimeters are used to measure actual evapotranspiration of cowpea for an experiment conducted for two years during Kharif 2004 and 2005. A multiple regression equation has been generated for relating crop coefficient of cowpea with week after sowing. The highest value of crop co-efficient was found to be 1.015 on 6th week after sowing under Bangalore climate, the average values of actual evapotranspiration from cowpea crop and heat unit requirements over a period of 89 days in the Kharif season are found to be 284.8 mm and 1293 degree days respectively.