eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2026-05-11 14 1 218 226 26656 article Temsunaro Imsong 1 Praveen Dukpa 1 Department of Economics, St. Joseph University, Chumoukedima, Nagaland, India. The research was carried out in Dimapur and Chumoukedima districts of Nagaland to study the economic performance, cost structure, economic efficiency of resource use and constraints of oyster mushroom cultivation in the state. A total of 70 oyster mushroom cultivators have been selected via snowball sampling technique. The study shows that BCR was 2.02, 2.04 and 2.30 for small, medium and large farms, with higher returns observed in large farms. The total production elasticity of 1.10 exceeds unity, signifying growing returns on scale. Resource utilization efficiency showed that straw, spawn, labour and miscellaneous were over utilized, while polybags were slightly under- utilized. The major constraints faced by farmers were lack of capital and financial support, unfavourable climatic conditions and unavailability of quality inputs. The results indicate that Oyster mushroom is a profitable venture in Nagaland. However, a structured resource management, skill- enhancement, and easy access to credit can improve resource efficiency and ensure a sustainable growth. http://www.agriculturejournal.org/volume14number1/farm-level-efficiency-and-input-utilization-in-oyster-mushroom-cultivation-an-empirical-study-of-nagaland/ Benefit- Cost ratio; Cobb- Douglas production function; Constraints; Input utilization; Oyster mushroom; Resource Efficiency