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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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Estimating Crop Coefficients Using Remote Sensing-Based Vegetation Index
TL;DR: The procedure for quantifying crop coefficients from NDVI data presented in this paper should be useful in other regions of the globe to understand regional irrigation water consumption.
Journal ArticleDOI
Test of AquaCrop model in simulating biomass and yield of water deficient and irrigated barley (Hordeum vulgare)
TL;DR: In this paper, the FAO AquaCrop model was used to simulate the response of barley to water and simulate the biomass and grain yield of barley under various water inputs and planting dates.
Posted Content
Trees and water: smallholder agroforestry on irrigated lands in Northern India
TL;DR: In this article, the authors investigated the importance and role of poplar trees within the agricultural landscape, and to estimate their water use using remote sensing and spatial hydrological modeling to address the increasing global demand for wood products with trees grown on-farm within irrigated agroforestry systems.
Journal ArticleDOI
25 years of the WOFOST cropping systems model
Allard de Wit,Hendrik Boogaard,Davide Fumagalli,Sander Janssen,Rob Knapen,Daniel van Kraalingen,Iwan Supit,Raymond van der Wijngaart,Kees van Diepen +8 more
TL;DR: This paper provides an updated description of the WOFOST model and reflects on the lessons learned over the last 25 years, including issues like system performance, model sensitivity, spatial model setup, parameterization and calibration approaches as well as software implementation and version management.
Journal ArticleDOI
Crop yield reduction in the tropics under climate change: Processes and uncertainties
Andrew J. Challinor,Tim Wheeler +1 more
TL;DR: In this article, a perturbed-parameter crop modelling method together with a regional climate model (PRECIS) driven by the 2071-2100 SRES A2 emissions scenario was used to examine processes and uncertainties in yield simulation.
References
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Journal ArticleDOI
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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