This study aimed to estimate the daily reference evapotranspiration for the town of Capim, PB, using the methods of Penman-Monteith, Linacre and Radiation, subsequently correlated with the season. For this, meteorological data were collected from the automatic weather station installed at Capim II Farm during the period of December 21, 2006 to December 20, 2007, recorded at intervals of 3 h. From the correlations obtained with the method of Penman-Monteith, the radiation method stood out with the coefficients of determination greater than 0.80.
agriculture; water; radiation; air temperature
