Abstract
MEASURED lysimeter evapotranspiration of Alta fescue grass (a cool season grass) is taken as an index of reference crop evapotranspiration (ETo). An equation is presented that estimates ETo from measured values of daily or mean values of maximum and minimum temperature. This equation is compared with various other methods for estimating ETo. The equation was developed using eight years of daily lysimeter data from Davis, California and used to estimate values of ETo for other locations. Comparisons with other methods with measured cool season grass evapotranspiration at Aspendale, Australia; Lompoc, California; and Seabrook, New Jersey; with lysimeter data from Damin, Haiti; and with the modified Penman for various locations in Bangladesh indicated that the method usually does not require local calibration and that the estimated values are probably as reliable and useable as those from the other estimating methods used for comparison. Considering the scarcity of complete and reliable climatic data for estimating crop water requirements in developing countries, this proposed method can do much to improve irrigation planning design and scheduling in the developing countries.
Keywords
LysimeterEvapotranspirationEnvironmental scienceIrrigation schedulingCrop coefficientIrrigationHydrology (agriculture)Growing seasonWater balanceAgronomySoil scienceEcologySoil waterEngineeringBiology
Related Publications
Role of Allochthonous Detritus in the Trophic Structure of a Woodland Springbrook Community
The community trophic structure of Morgan's Creek, Meade County, Kentucky was analyzed through regular measurement of standing crops of the chief potential sources of plant mate...
III. The influence of rainfall on the yield of wheat at Rothamsted
At the present time very little can be claimed to be known as to the effects of weather upon farm crops. The obscurity of the subject, in spite of its immense importance to a gr...
Spatial and temporal variability of the phenological seasons in Germany from 1951 to 1996
Various indications for shifts in plant and animal phenology resulting from climate change have been observed in Europe. This analysis of phenological seasons in Germany of more...
Toward understanding the origin and evolution of cellular organisms
Abstract In this era of high‐throughput biology, bioinformatics has become a major discipline for making sense out of large‐scale datasets. Bioinformatics is usually considered ...
Global Patterns of Cancer Incidence and Mortality Rates and Trends
Abstract While incidence and mortality rates for most cancers (including lung, colorectum, female breast, and prostate) are decreasing in the United States and many other wester...
Publication Info
- Year
- 1985
- Type
- article
- Volume
- 1
- Issue
- 2
- Pages
- 96-99
- Citations
- 4358
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
4358
OpenAlex
Cite This
George H. Hargreaves,
Zohrab Samani
(1985).
Reference Crop Evapotranspiration from Temperature.
Applied Engineering in Agriculture
, 1
(2)
, 96-99.
https://doi.org/10.13031/2013.26773
Identifiers
- DOI
- 10.13031/2013.26773