نتایج جستجو برای: evapotranspiration

تعداد نتایج: 6966  

Journal: :Journal of the Irrigation and Drainage Division 1982

This study was conducted to determine the yield response factor (Ky) of wheat with respect to deficit irrigation at different growth stages. The experiment was conducted in Shahrekord in three crop growing seasons using randomized complete blocks design with 3 replications. Treatments consisted of five levels of deficit irrigation: E0 (full irrigation), E1 (85%), E2 (70%) and E3 (55%) of potent...

Journal: :Netherlands Journal of Agricultural Science 1959

2010
Yu-Jun Cui Yanbin Gao Valéry Ferber Y. J. Cui Y. B. Gao V. Ferber

: : : : An experimental embankment was constructed in Rouen, France. The construction was completed in December 2004. The first objective of this experiment is to investigate the influence of climatic changes on the soil response such as changes in water content and temperature as well as the induced vertical and horizontal displacements; and the second objective is to investigate the soil resp...

Journal: :آب و خاک 0
مریم حمزه زاده پرویز فتحی تیمور جوادی عباس حسنی

abstract due to limited water resources and occurrence of recent droughts, the use of new management and planning methods for optimal irrigation scheduling of agricultural crops is inevitable. present of appropriate mathematical and dynamic relationship between yield, evapotranspiration and water use efficiency parameters is the first and most important step in the optimal management of irrigat...

Heydar Zarei Keyvan Bolhasani,

Reference Evapotranspiration (ET0) is a basic parameter for determination of irrigation program. It is one of the most important factors in water resources management and considers as a requirement for every irrigation and drainage plans. Because of the spatial variations of ET0, it is necessary to use from intrapolation methods in order to estimation of this parameter in regional studie. Using...

Journal: :دانش آب و خاک 0
داود زارع حقی استادیار گروه علوم و مهندسی خاک، دانشگاه تبریز محمدرضا نیشابوری استاد گروه علوم و مهندسی خاک، دانشگاه تبریز ابوالفضل مجنونی هریس استادیار گروه مهندسی آب، دانشگاه تبریز رضا حسن پور دانشجوی دکترای گروه علوم و مهندسی خاک، دانشگاه تبریز شیوا میرزائی دانش آموخته کارشناسی ارشد گروه علوم و مهندسی خاک، دانشگاه تبریز

for estimating plants water requirement at the different stages of plant growth, determination of crop coefficient is very important. therefore, this study was conducted to determine the crop coefficient of borage in research lands of faculty of agriculture at the university of tabriz in 2013. for this purpose, drainage lysimeter with diameter of 1.5 meter and depth of 1.7 meter was used for de...

Journal: :journal of agricultural science and technology 2011
b. bakhtiari a. m. liaghat

seasonal variations of climatic parameters are significant in arid and semi-arid regions and sensitivity of each parameter may differ in different seasons. no work has been done in this regard in iran. therefore, in this study, sensitivity analysis of the asce-penman-monteith grass reference evapotranspiration (eto) equation was investigated on the basis of variation of mean air temperature (tm...

Journal: :Remote Sensing 2013
Pamela L. Nagler Edward P. Glenn Uyen Nguyen Russell L. Scott Tanya Doody

Dryland river basins frequently support both irrigated agriculture and riparian vegetation and remote sensing methods are needed to monitor water use by both crops and natural vegetation in irrigation districts. We developed an algorithm for estimating actual evapotranspiration (ETa) based on the Enhanced Vegetation Index (EVI) from the Moderate Resolution Imaging Spectrometer (MODIS) sensor on...

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