نتایج جستجو برای: hargreaves samani

تعداد نتایج: 589  

Journal: :Dyna-colombia 2021

This paper aimed to propose the development of a digital irrigimeter, in order assist water sizing, be used sprinkler irrigation process, different cultures. From realization market research, it was verified existence gap represented by individuals who have difficulty dimensioning water, irrigation. Thus, Hargreaves-Samani methodology, for calculations optimum amount precipitated, per square me...

فتحعلیان, فریده , نوری امامزاده‌ئی, محمدرضا ,

Soil and water resources are limited and optimal use of water resources in agriculture requires accurate determination of water consumed by plant species in different circumstances. This situation is necessary more than ever due to fast development of greenhouse cultivation. In this regard, to determine evapotranspiration and crop coefficient (KC) of greenhouse cucumber, two microlysimeters wer...

Journal: :journal of agricultural science and technology 2012
j. z. xu s. z. peng s. h. yang y. f. luo y. j. wang

the hargreaves-samani (hs) equation, which estimates reference evapotranspiration (et0) using only temperature as input, should be most suitable for et0 prediction based on weather forecasting data. in the current study, the hs equation is calibrated with daily et0 by the penman-monteith equation, and is evaluated to check the possibility of predicting daily et0 based on weather forecast data. ...

Journal: :Horticulturae 2023

In this study, the effects of climate change on irrigation water requirement hazelnut trees were investigated in Central Italy. The meteorological variables considered precipitation, temperature, chilling units, and Standardized Precipitation Index (SPI) hydrological reference evapotranspiration (ET0) based soil balance. Climate data collected from eight stations for period 1974–2021, ET0 was e...

Journal: :Revista Verde de Agroecologia e Desenvolvimento Sustentável 2020

Journal: :Water Science & Technology: Water Supply 2021

Abstract Reference evapotranspiration (ETo) is critical for irrigation design and water management in rainfed irrigated agriculture. The Penman-Monteith (FAO-56(PM)) equation was demonstrated to be the most reliable adaptive a wide range of humid semi-arid climates. However, it requires several environmental parameters (e.g., wind speed, solar radiation), rarely available developing countries. ...

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