Profile of Temperature and Relative Humidity and Measure of Evapotranspiration in Summer Green Gram (Vigna radiata L. Wilczek.) Crop under Semi-Arid Region of Haryana, India

A field experiment was conducted at Research Farm, Dept of Agril Meteorology, CCS HAU, Hisar Haryana, India during the summer season in the 2020 and 2021. Experimental designed laid out with factorial randomized design, as main plot treatment: date of sowing i.e. D1-1st second fortnight of March with sub plot treatment viz., V1: MH 421, V2: MH 318, V3; MH 1-25. Temperature and Humidity in the atmosphere is of great biological importance. Measurements relative humidity and temperature were made at 9:00, 12:0 & 16:00 hourly intervals throughout the observation day with the help of Psychrometric. The humidity profiles indicated that the relative humidity was higher inside the crop canopy than above the canopy in all the treatments i.e. the relative humidity profiles were lapse inside the crop canopy throughout the day while iso-humic at morning hours at different growth stage during crop season 2020 and 2021. Humidity profiles were observed lapse in NW-SE direction within crop canopy during the both crop season. The temperature profiles indicated that the temperature inside the canopy was lower than recorded at top of the canopy in all the treatments i.e. temperature profiles were inverse throughout the day within the canopy. Over the top of the crop canopy the temperature profile was lapse. Temperature profiles were observed inverse in NW-SE direction within crop canopyduring the both crop season. The evapotranspiration observed high in MH 318, East-West and the lowest was observed MH 421, NW-SE during both the crop seasons. As per study, it was observed that suitable sowing direction is NW-SE with MH 421 varieties.