Martin Smith
Food and Agriculture Organization
15Publications
6H-index
14kCitations
Publications 15
Newest
Published on Jan 1, 2015in Agricultural Water Management 3.18
Luis S. Pereira50
Estimated H-index: 50
(Instituto Superior de Agronomia),
Richard G. Allen46
Estimated H-index: 46
(University of Idaho)
+ 1 AuthorsDirk Raes13
Estimated H-index: 13
(Katholieke Universiteit Leuven)
Abstract The FAO Irrigation and Drainage Paper No 56 on Crop Evapotranspiration has been in publication for more than 15 years. The paper advanced the accuracy and consistency of operational computation of evapotranspiration (ET) for agricultural and other land use types. The paper included updated definition and procedures for computing reference ET, an update on estimating crop coefficients ( K c ), the adoption of the dual K c for separate estimation of crop transpiration and soil evaporation...
137 Citations Source Cite
Published on Mar 1, 2006in Agricultural Water Management 3.18
Richard G. Allen46
Estimated H-index: 46
(University of Idaho),
William O. Pruitt6
Estimated H-index: 6
(University of California, Davis)
+ 14 AuthorsJavier Baselga Yrisarry1
Estimated H-index: 1
Abstract Continued development of networks of electronic weather stations worldwide has increased the availability of weather data for calculating ET o on an hourly basis. There has been question and debate as well as studies on the appropriate expression and parameterization for the surface resistance ( r s ) parameter of the Penman-Monteith (PM) equation and the associated coefficient for the reduced form FAO-PM equation when applied hourly. This paper reviews the performance of the FAO-PM met...
264 Citations Source Cite
Richard G. Allen46
Estimated H-index: 46
,
William O. Pruitt6
Estimated H-index: 6
(University of California, Berkeley)
+ 2 AuthorsLuis S. Pereira50
Estimated H-index: 50
The crop coefficient during the initial period sKc inid varies with wetting frequency, evaporative demand, and water-holding capacity of the upper soil layer. It is possible to develop a semitheoretical integrated function to predict the average Kc ini representing the initial period of a growing season when the soil is mostly bare and that incorporates these three factors. The function is based on a two-stage evaporation function as used in the Food and Agriculture Organization Irrigation and D...
56 Citations Source Cite
Published on Aug 1, 2005in Agricultural Water Management 3.18
Delphine Luquet6
Estimated H-index: 6
,
Alain Vidal8
Estimated H-index: 8
+ 1 AuthorsJean Dauzat17
Estimated H-index: 17
Abstract In countries facing water scarcity, governmental water agencies try to transfer this constraint to farmers, e.g. by encouraging them to shift from traditional to localized irrigation methods to save water. However, water shortage is often much less a problem for farmers than soil limitations, their objective being mostly to maximize their income per cultivated area (US$ per hectare rather than per cubic meter of water). This discrepancy can only be solved if governments find ways to ‘tr...
47 Citations Source Cite
Richard G. Allen46
Estimated H-index: 46
(University of Idaho),
Luis S. Pereira50
Estimated H-index: 50
(Technical University of Lisbon)
+ 2 AuthorsJames L. Wright17
Estimated H-index: 17
(United States Department of Agriculture)
Crop coefficient curves provide simple, reproducible means to estimate crop evapotranspiration (ET) from weather-based reference ET values. The dual crop coefficient sKcd method of the Food and Agricultural Organization of the United States (FAO) Irrigation and Drainage Paper No. 56 (FAO-56) is intended to improve daily simulation of crop ET by considering separately the contribution of evaporation from soil. The dual method utilizes "basal" crop coefficients representing ET from crops having a ...
238 Citations Source Cite
Published on Jun 1, 2000in Agricultural and Forest Meteorology 4.04
Martin Smith6
Estimated H-index: 6
(Food and Agriculture Organization)
Abstract Sustainable food production will depend on the judicious use of water resources as fresh water for human consumption and agriculture is becoming increasingly scarce. To meet future food demands and growing competition for clean water, a more effective use of water in both irrigated and rainfed agriculture will be essential. Options to increase water use efficiency include the conservation of rainfall, the reduction of irrigation water losses and the adoption of cultural practices that w...
126 Citations Source Cite
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