REFERENCE EVAPO-TRANSPIRATION (ETo): BLANEY-CRIDDLE AND JENSEN-HAISE METHODS FOR BLACKGRAM AND WHEAT CROPS

NEERAJ KUMAR¹*, B.M. MOTE², A.L. CHALODIA³, A. SRIVASTAVA^4
1Department of Agronomy, College of Agriculture, Bharuch, 392012, Navsari Agricultural University, Navsari, 396 450, Gujarat, India
²Directorate of Research Office, Navsari Agricultural University, Navsari, 396 450, Gujarat, India
³Main Sorghum Research Station, Surat, 390007, Navsari Agricultural University, Navsari, 396 450, Gujarat, India
⁴Department of Statistics, College of Agriculture, Bharuch, 392012, Navsari Agricultural University, Navsari, 396 450, Gujarat, India
* Corresponding Author : neeraj34012@gmail.com

Received : 03-04-2021     Accepted : 27-04-2021     Published : 30-04-2021
Volume : 13     Issue : 4       Pages : 10731 - 10734
Int J Agr Sci 13.4 (2021):10731-10734

Keywords : CERES model, CROPGRO model, Reference evapotranspiration (ETo), Emprical methods, Wheat, Blackgram
Conflict of Interest : None declared
Acknowledgements/Funding : The authors are thankful to Department of Agrometeorology, G.B. Pant University of Agricultural and Technology, Pantnagar, Uttarakhand for guidance and support for carrying out research. The authors are also thankful to University Grants Commission (UGC) towards providing financial assistance to carry out research
Author Contribution : All authors equally contributed

CERES wheat and CROPGRO model (DSSAT version v4.5) were used in this study for assessment of ETo. Blackgram season accumulated ETo mm during the years 2007 and 2008 for simulated, Jenson-Haise method and Blaney-Criddle method were 39.04 and 38.39, 37.66 and 39.19 and 40.83 and 36.56 respectively. Wheat season accumulated reference evapotranspiration for 2007 and 2008 for simulated, Jenson-Haise method and Blaney-Criddle method were 40.83 and 41.76, 35.61 and 39.64, 40.82 and 46.08 respectively. Overall, the calibrated ETo by Jensen-Haise method gave closer percentage over simulated ETo with higher correlation and lower error percentage as compare with Blaney-Criddle method. The results revealed that the CERES wheat and CROPGRO model satisfactorily simulated the ETo mm/day

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