Journal
COMPUTERS AND ELECTRONICS IN AGRICULTURE
Volume 74, Issue 1, Pages 155-162Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compag.2010.08.002
Keywords
Agro-climate; Visual basic; Ogallala aquifer; Crop evapotranspiration; Water management
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A Visual Basic (TM) agro-climate application capable of estimating crop evapotranspiration and irrigation demand over the Ogallala aquifer region is described here. The application's meteorological database consists of daily precipitation and temperature data from 141 U.S. Historical Climatology Network stations during 1976-2005. From that daily data the program calculates climate and crop evapotranspiration (ET(c)) statistics over arbitrarily defined periods within summer or winter growing seasons at user-selected latitude-longitude coordinates. The statistics reported include: estimates of seasonal and sub-seasonal ET(c) derived from the FAO-56 single crop coefficient algorithm, probabilities of exceedance of cumulative rainfall, irrigation demand and growing degree clays, the probability that minimum and maximum daily temperatures will exceed user-defined temperature thresholds, and the probability of heat stress, cold stress and dry periods of varying duration. Published by Elsevier B.V.
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