Vol. 12, Issue 6 (2023)

Author(s):
Harish H Deshpande and Harshada P Deshmukh

Abstract:
The study on estimation of reference evapo-transpiration (ETo), crop water requirement (CWR) and net irrigation requirement (NIR) by Modified Penman (MP) and Penman Monteith (PM) method was conducted by Faculty of Agriculture, Water And Land Management Institute (WALMI), Aurangabad for various regions of Maharashtra during the period of 2018 to 2021. The main objective is to estimate ETo, CWR and NIR by MP and PM methods. One location from three regions of Maharashtra are selected for study viz., Marathwada (Aurangabad), Western Maharashtra (Rahuri Dist. Ahmed Nagar) and Vidarbha (Akola). The weather data’s are collected from Agro-meteorological observatories and analysed for the above said objectives. The result of the study revealed that Modified Penman Method was proposed for estimation of ETo, NIR and CWR of crops. Net irrigation requirements are estimated for the cropping Pattern of Gul Medium Project, Jalgaon (Maharashtra) by using three locations weather data. The total net irrigation requirement of crops for above said cropping pattern is highest for Aurangabad region followed Akola and Rahuri regions because of its spatial and temporal variation and distribution of rainfall and other important weather parameters.