“…In examining the literature on the variables used for the stochastic frontier production function, research groups (Hong & Yabe, 2015;Katungwe et al, 2017;Priyanath et al, 2018;Kodagoda & Dharmadasa, 2019) conducted studies on measuring the technical efficiency of small-scale tea plantation, where the tea yield is used as the dependent variable and extent of land, labour and fertilizer are commonly used as independent variables in the stochastic production function. Along with the above common variables, Basnayake and Gunaratne (2002) In examining the literature on the variables used for the technical efficiency function, according to Battese and Coelli (1995) the variables such as the age of farmer, experience, education, occupation, type of crop (VP or seedling) and type of clone were used.…”