Dhanai, C.S.(Dr.)Dhyani, MonikaBijlwan, Arvind(Dr.) (Member)Bali, R.S.(Dr.) (Member)Chaudhary, Sumit(Dr.) (Member)2024-08-062024-08-062023Th322https://krishikosh.egranth.ac.in/handle/1/5810212883Title: “Assessment of yield potential, carbon sequestration and economic benefits of wheat-Eucalyptus based Agroforestry system in sub tropicalCondition of Uttarakhand” The study entitled “Assessment of yield potential, carbon sequestration and economic benefits of wheat-Eucalyptus based Agroforestry system in sub tropicalcondition of Uttarakhand”. The objective were - to study about evaluating soil characteristics of wheat-Eucalyptus based agroforestry system, to determine biomass production and carbon sequestration of Eucalyptus-wheat based agroforestry system and to Study about yield attributes of wheat and economic benefit of Eucalyptus. A field experiment was carried in three different site viz., site-1(Kotdwar), site-2 (Doiwala) and Selaqui (Dehradun). The study carried four different distance from the tree base D1(distance from tree base - 1m), D2(distance from tree base-2m) and D3(distance from tree base-3m) to study about crop growth and yield of wheat under Eucaylptusbased agroforestry system. The study result demonstrated that the pH was slightly acidic to basic range. The soil organic carbon maximum showed at 0-15 cm soil depth at kotdwara (0.83) while in 30-45 cm soil the maximum OC recored at Doiwala (0.59).The maximum available nutrient recorded at site -1 followed by site-2 and minimum at site-3. The maximum height of crop observed at control in site -1 followed by site-2 and minimum at site-3. The grain yield gradually increased with increased in distance from the tree base. The maximum mean value observed at control 34.84q/ha and minimum mean value recorded at D1 (27.27q/ha). The plant height and grain yield, straw yield, biological yield and harvesting index was recorded maximum at site-1 in control condition followed by D3, D2 and minimum in D1. The plant height, grain yield, straw yield, biological yield and harvesting index was recorded minimum at site-3 in control condition followed by D3, D2 and minimum in D1. The growing stock, AGBD, BGBD, and TCD range from 43.62 to 40.70, 81.53 to 77.33Mg ha-1, 21.48 to 21.43Mg ha-1 and 52.03 to 49.04Mg ha-1. The maximum carbon density was recorded at site-1 (52.039Mg ha-1) and minimum recorded at site-3 (49.4091Mg ha-1). Thehigher B:C ratio (6.33) was obtained in Eucalyptus based agroforestry+ Wheat agroforestry system over (2.099) wheat control and 4.24 Eucalyptus cultivation.This indicated that Eucalyptus based agroforestry system economically benefits than open farming.EnglishThesis