The objective was to perform a comparative study of the meteorological elements data that most cause changes in reference Evapotranspiration (ETo, mm) and its own value, automatic weather stations AWS conventional CWS Sertão Agreste regions Pernambuco State. ETo calculated on daily scale using standard method proposed by Food Agriculture Organization (FAO), Penman-Monteith (FAO-56). information...

So far, various methods have been presented for determining reference crop evapotranspiration in different parts of the world. The most popular and prestigious of them are probably the combined methods of Penman family, modified Blany-Criddle, Hargreaves - Samani and thornthwaite. Due to lack of lysimeter data in many parts of Iran, presenting an equation according to the regional condition wit...

Accurate estimation of evapotranspiration plays a vital role in judicious irrigation scheduling. Keeping this view, study was undertaken to compare the performance five methods, viz. Penman method (PM), FAO Monteith (FAO-PM), Priestley-Taylor (PT), Radiation (FAO-RM) and Hargreaves methods (HM) for Sultanpur District Uttar Pradesh, India using daily weather data acquired from automatic station ...

Water is one of the most important elements in this world. No life will exist without water. The main consumer water agriculture but due to mismanagement, overpopulation, and climatic changes valuable natural resource getting scarce position throughout It has become very define appropriate strategies for planning, development, management resources. objective paper estimation crop requirement Kh...

in agricultural practices, reference evapotranspiration (et0) parameters need to be specified for crop water requirement determination. although, the crop water requirement is not an easy task. numerous mathematical models and experimental methods have been developed for this purpose in the entire world. on the other hand, ten-daily and monthly average meteorological data are used in many of ir...

Knowing crop water uptake each day is useful for developing irrigation scheduling. Many technologies have been used to estimate daily use. Sap flow one of the that measure through stem a plant and uptake. sensor an effective direct method measuring use, but it relatively expensive requires frequent maintenance. Therefore, alternative methods, such as evapotranspiration based on FAO 56 Penman-Mo...