Allen, R.G., Pereira, L.S., Raes, D. and Smith, D. (1998) Crop Evapotranspiration (Guidelines for Computing Water Requirements). FAO Irrigation and Drainage Paper 56. Food and Agricultural Organization of the United Nations, Rome, 299 p.

has been cited by the following article:

• TITLE: Determination of Reference Evapotranspiration Using Penman-Monteith Method in Case of Missing Wind Speed Data under Subhumid Climatic Condition in Hungary

  AUTHORS: Zoltán Varga-Haszonits, Éva Szalka, Tamás Szakál

  KEYWORDS: Reference Evapotranspiration, Global Radiation, Vapor Pressure Deficit, Sub Humid Climate, Irrigation Requirements of Crops

  JOURNAL NAME: Atmospheric and Climate Sciences, Vol.12 No.2, February 16, 2022

  ABSTRACT: The reference evapotranspiration was calculated using Penman-Monteith method proposed. This method was evaluated on data measured by lysimeter in Szarvas experimental station in Hungary. The results of the two methods were in good agreement. However, this method requires an amount of data which is not available at all sites of meteorological measurement. Therefore it was necessary to investigate which elements influencing evapotranspiration are important and which elements are less important. With the help of investigation was indicated that radiation and vapor pressure deficit play important role in determination of reference evapotranspiration. Taking into account this there was two possibilities to calculate evapotranspiration. One of these is to use Penman-Monteith formula with constant wind speed as advised by Allen. Another one is to neglect wind speed data. Both methods were investigated and the method with constant wind speed was found better in a subhumid climatic condition of Hungary.