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Crop evapotranspiration : guidelines for computing crop water requirements
Richard G. Allen,Luis S. Pereira,Dirk Raes,Martin Smith +3 more
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In this paper, an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients is presented, based on the FAO Penman-Monteith method.Abstract:
(First edition: 1998, this reprint: 2004). This publication presents an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients. The procedure, first presented in FAO Irrigation and Drainage Paper No. 24, Crop water requirements, in 1977, allows estimation of the amount of water used by a crop, taking into account the effect of the climate and the crop characteristics. The publication incorporates advances in research and more accurate procedures for determining crop water use as recommended by a panel of high-level experts organised by FAO in May 1990. The first part of the guidelines includes procedures for determining reference crop evapotranspiration according to the FAO Penman-Monteith method. These are followed by updated procedures for estimating the evapotranspiration of different crops for different growth stages and ecological conditions.read more
Citations
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Exploring the water storage changes in the largest lake (Selin Co) over the Tibetan Plateau during 2003-2012 from a basin-wide hydrological modeling
TL;DR: In this article, the authors explored the variations of Delta S-w for the Lake Selin Co (the largest closed lake on the Tibetan plateau) during 2003-2012 using the Water and Energy Budget-based Distributed Hydrological Model (WEB-DHM) together with two different evapotranspiration (ET) algorithms (the Penman-Monteith method and a simple sublimation estimation approach for water area in unfrozen and frozen period).
Journal ArticleDOI
New approaches for estimating global solar radiation across Sudan
TL;DR: In this article, the authors investigated the possibility of establishing monthly-specific equations for estimating global solar radiation across Sudan using data from 16 stations, stretching along sub-humid, semi-arid, arid and hyperarid zones.
Journal ArticleDOI
Comparison of heuristic and empirical approaches for estimating reference evapotranspiration from limited inputs in Iran
Jalal Shiri,Amir Hossein Nazemi,Ali Ashraf Sadraddini,Gorka Landeras,Ozgur Kisi,Ahmad Fakheri Fard,Pau Martí +6 more
TL;DR: In this paper, a comprehensive comparison of empirical and semi empirical ET0 equations with the corresponding Heuristic Data Driven (HDD) models in a wide range of weather stations in Iran is presented.
Journal ArticleDOI
The effect of different irrigation water levels on yield and quality characteristics of purple basil (Ocimum basilicum L.)
Sıdıka Ekren,Çiğdem Sönmez,Emrah Özçakal,Yasemin S. Kukul Kurttaş,Emine Bayram,Hatice Gürgülü +5 more
TL;DR: In this article, the effect of different irrigation water levels on the plant's plant height, green herb yields, drug herb yield, and drug leaf yield, the irrigation water use efficiency, essential oil ratio, and composition of essential oil were evaluated.
Journal ArticleDOI
Comparing the interactive effects of water and nitrogen on durum wheat and barley grown in a Mediterranean environment
TL;DR: The response of both crops to N fertilization was higher in the year characterized by greater water availability during the most sensitive stages to drought stress, and barley reached higher N utilization efficiency than wheat, mainly because of a lower N concentration in the grain than a higher efficiency in using the available N.
References
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Natural evaporation from open water, bare soil and grass
TL;DR: It is shown that a satisfactory account can be given of open water evaporation at four widely spaced sites in America and Europe, the results for bare soil receive a reasonable check in India, and application of theresults for turf shows good agreement with estimates of evapolation from catchment areas in the British Isles.
Journal ArticleDOI
On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters
C. H. B. Priestley,R. J. Taylor +1 more
TL;DR: In this article, the large-scale parameterization of the surface fluxes of sensible and latent heat is properly expressed in terms of energetic considerations over land while formulas of the bulk aerodynamic type are most suitahle over the sea.
Book
Water quality for agriculture
R. S. Ayers,D. W. Westcot +1 more
TL;DR: Water quality for agriculture, water quality in agriculture for agriculture as mentioned in this paper, water quality of agriculture, Water quality of water for agriculture in agriculture, مرکز فناوری اطلاعات و اسلاز رسانی
Journal ArticleDOI
The Interpretation of the Variations in Leaf Water Potential and Stomatal Conductance Found in Canopies in the Field
TL;DR: In this paper, the stomatal conductance of illuminated leaves is a function of current levels of temperature, vapour pressure deficit, leaf water potential (really turgor pressure) and ambient CO $_2$ concentration and when plotted against any one of these variables a scatter diagram results.
Book ChapterDOI
Yield response to water
TL;DR: In this paper, a methodology to quantify yield response to water through aggregate components which form the "handles" to assess crop yields under both adequate and limited water supply is presented, which takes into account maximum and actual crop yields as influenced by water deficits using yield response functions relating relative yield decrease and evapotranspiration deficits.
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