Results 261 to 270 of about 21,126 (306)

Similarity and difference of potential evapotranspiration and reference crop evapotranspiration – a review

Agricultural Water Management, 2020
Abstract Potential evapotranspiration (ETp) and reference crop evapotranspiration (ETo) differ in their developments, concepts, equations and application fields, however, many researchers have mixed the utilization of the two terms. Thus, it is necessary to clarify the terms to guide their proper usage.
Keyu Xiang, Yi Li, Robert Horton, Hao Feng   +3 more
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Evapotranspiration Model for Developing Crops

Transactions of the ASAE, 1989
ABSTRACT Crop water use is a complex function of climatic conditions, stage of crop development and soil water content. Using principles of heat and mass balance, a comprehensive evapotranspiration model was developed to predict water use, soil evaporation, transpiration and microclimate of a crop where the soil may go through cycles ofwetting and ...
null S. S. Jagtap, null J. W. Jones
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Forecasting of reference crop evapotranspiration

Agricultural Water Management, 1993
Abstract The first step in the determination of irrigation water requirements for use in project planning, design, and operation commonly involves the prediction of the reference crop evapotranspiration. This paper presents a simple mathematical model for forecasting reference crop evapotranspiration at three stations in California that represent ...
Miguel A. Mariño, John C. Tracy, S.Alireza Taghavi   +2 more
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Reference and Crop Evapotranspiration

2012
Advancements have been made in estimating potential and reference evapotranspiration. Actual crop evapotranspiration estimation still is a challenge due to limited availability of local crop coefficients and large-scale variation in field conditions.
Wossenu Abtew, Assefa Melesse
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Evaluation of evapotranspiration for agricultural crops

2015 IEEE International Conference on Computational Intelligence and Computing Research (ICCIC), 2015
Today's world is in safe of secure environment but really we are in need of healthy food and chemical-free environment which is free from pollution and harmful pesticides. This paper is to project the aspects of geographical information system(GIS) in agricultural field for effective yield and efficient use of water for crops and it helps as a guide to
S. Priyadharshini, R. Aroul Canessane
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Crop evapotranspiration of chilli in the tropics

Communications in Soil Science and Plant Analysis, 1994
Abstract The rate of crop evapotranspiration though can be predicted theoretically but the actual field study would give a more accurate data. Result from a simple lysimeter study showed that the daily rate of actual crops evapotranspiration, ETa of chilli (Capsicum annum) under the tropical condition was in the range between 4.94–7.72 mm. Their actual
Ayob Katimon, Zainal Abidin Idris
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Crop coefficients for peanut evapotranspiration

Agricultural Water Management, 1988
Abstract Meteorological and soil moisture data were collected from field sites in Caddo County, Oklahoma, during the 1984 and 1985 irrigation seasons. Analysis of alfalfa (Medicago sativa L.) water use data enabled calibration of the modified Penman equation for reference crop evapotranspiration ( et ).
Ronald L Elliott, Sam L Harp, Gerald D Grosz, Michael A Kizer   +3 more
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Neural computing modeling of the reference crop evapotranspiration

Environmental Modelling & Software, 2012
Reference crop evapotranspiration (ET"o) estimation is of importance in irrigation water management for the calculation of crop water requirements and its scheduling, in rainfall-runoff modeling and in numerous other water resources studies. Due to its importance, several direct and indirect methods have been employed to determine the reference crop ...
Adebayo J. Adeloye, Rabee Rustum, Ibrahim D. Kariyama   +2 more
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PREDICTION SALINE WATERTABLE CONTRIBUTION TO CROP EVAPOTRANSPIRATION

Acta Horticulturae, 2002
Disposal of drain water from irrigated areas in and regions has become a significant problem. Methods are needed to minimise the volume of water requiring disposal. Shallow groundwater may represent a substantial resource by capillary rise in flat, low-lying areas, but may also represent a threat to sustainability where salinity is high. Experiments in
Konukçu, F, Sener, M
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Estimates of Crop Evapotranspiration in Egypt

Water and Environment Journal, 1988
SYNOPSISThe WORK DESCRIBED is part of a feasibility study for the rehabilitation of the Old Lands irrigation areas in Egypt. Despite much previous work there is still some controversy regarding the consumptive use of water by crops in Egypt. The present study utilized the Energy Balance (sometimes also called Bowen Ratio) method to determine the actual
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