_____________________________________________________________________________________________________ *Corresponding author: Email: gaurav.swce@gmail.com; Journal of Engineering Research and Reports 13(1): 12-20, 2020; Article no.JERR.57032 ISSN: 2582-2926 An Attempt to Modify the Crop Coefficient Value of Wheat and Chickpea for Humid Subtropical Climate of Varanasi District, Uttar Pradesh Chandra Kishor Kumar 1 , Gaurav Sharma 2* and Anshu Gangwar 3 1 Department of Farm Engineering, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, U,P., India. 2 Central India Hydrology Regional Centre, National Institute of Hydrology, Bhopal, M.P., India. 3 Krishi Vigyan Kendra, Piprakothi, East Champaran, DRPCAU, Pusa, Bihar, India. Authors’ contributions This work was carried out in collaboration among all authors. Author CKK designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Author GS managed the analyses of the study. Author AG managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JERR/2020/v13i117091 Editor(s): (1) Dr. Guang Yih Sheu, Chang Jung Christian University, Taiwan. Reviewers: (1) S. Kizza-Nkambwe, Uganda Christian University, Uganda. (2) Zimeras Stelios, University of the Aegean, Greece. Complete Peer review History: http://www.sdiarticle4.com/review-history/57032 Received 15 March 2020 Accepted 20 May 2020 Published 29 May 2020 ABSTRACT Crop water requirement is one of the essential components that should always be taken into account wherever water management strategies are adopted for effective utilization of water. In India agriculture is considered as the backbone of economy but nothing technical or advance technology has being adopted for its advancement and still major portion of agriculture are dependent on the verge of monsoon. Therefore crop coefficient (Kc) value for wheat and Chickpea as a function of relative humidity, wind speed and crop height has been formalized in this study for efficient use of available water. The empirical formula was applied for estimating Kc(mid) and Kc(end) values for humid subtropical climate of Varanasi. The corrected crop coefficient value of wheat for Kc(mid) was found to be 1.12 and for end season Kc(end) corrected was found to be 0.42. Mean maximum height of wheat crop in mid-season was obtained as 0.80 m and for the end season mean maximum height was found to be 0.99 m. The corrected crop coefficient value of Original Research Article