Received: 21-07-2022 / Accepted: 15-08-2022
So far, agricultural technicians believe a maxium yield while economists consider profits as the most important indicator for selecting the optimal input use level in agriculture. Based on reviewing theoretical and practical issues on selectionof an input use level in agriculture, this paper shows thatthe highest profit is the most important criteria for selecting the optimal input use level in agriculture. Selecting an inputuse level that produces the maximum yieldwhich is higher than level of technical efficiency would not only bring about low profit but encourage excessive input use and lead to lowering product quality and negative environmental consequences. A market-oriented agricultural development requires agricultural researchersto take into accountthe cost incurred and output value received as well as related environmental protection issues. There is a need to upgrade agricultural technical researchers’ knowledge on and perception of economic and technical efficiencies.Aside from collecting biological data, agriculturalresearchers should also collect priceinformation on input usedand outputproducedfor selecting anoptimalinput use level to attainhighestprofit, which shouldbe considered to be the most important indicator for evaluation of agricultural research projects at different management levels.