abstract one of the losses decrease's ways in fields, is the proper irrigation management, which its base is the accurate estimation of crop water requirement. equations which are used to calculate the reference evapotranspiration (eto), do not use the same climatic parameters and due to their empirical base, are not match to all climatic situations. so it is needed to clarify proper methods fo...

abstract the present study is attempted to present the minimum required meteorological parameters for reference evapotranspiration estimation at hamedan region of iran from 1997 to 1998. employing pierson test, six meteorological parameters which are used by penman-montieth fao-56 method including maximum and minimum air temperature, maximum and minimum relative humidity, wind speed and daily s...

This paper aims to estimate Actual Evapotranspiration of major crops by using CROPWAT 8.0 software in 2A canal command Mahanadi Dhamtari district. evapotranspiration is a key process hydrological cycle and sole term that links land surface water balance energy balance. Irrigation an essential part different because rainfall not enough for irrigated farmland. Long daily meteorological data inclu...

a Department of Natural Science & Public Health, Zayed University, PO Box 19282, Dubai, United Arab Emirates b Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada N9B3P4 c Department of Biology and Chemistry, American University of Sharjah, PO Box 26666, Sharjah, United Arab Emirates d United Nations University, International Network on Water, Environment and Heal...

introduction: evaporation and evapotranspiration are two major components of hydrological cycle which are very important for agricultural studies as well as water resources management. so far, various methods have been addressed for the estimation of daily reference crop evapotranspiration (et0). among them, fao penman-montieth 56 (pmf-56) (allen et al., 1998) is widely used as a standard metho...

BACKGROUND The role of fixed airflow obstruction (FAO) in asthma is unclear. OBJECTIVE To assess the relationship between FAO and clinical features of asthma and the effect of FAO on treatment response. METHODS Post hoc descriptive analysis of data stratified by FAO category (screening post-albuterol FEV1/FVC <lower limit of normal [LLN] [FAO+] or ≥LLN [FAO-]) from two 12-week, randomized, ...