Gupta, O.P.Dubey, Mukesh2019-06-182019-06-182004-07http://krishikosh.egranth.ac.in/handle/1/5810108919India is the world's second largest wheat producer after China. Wheat is grown under diverse agro climatic conditions and occupies more than 25 million hectares area with average production of 70 million tones. About 88% of total geographical area of Uttaranchal is under hill and 12% of in plain region. Among cereals, wheat occupies the largest net sown area followed by rice. There are enormous small and marginal farmers in the state. The average size of operational land holding is 0.8 hectares (Uttaranchal Manual). Timely threshing of crop is essential in hill regions. Farmers in hill regions use conventional method like hand beating and animal feet trampling for threshing crops. There is a crucial need of small size wheat thresher which can make bhusha, and separate bhusha and grains. The requirement of “Bhusha” making puts an essential constraint on designing wheat crop thresher which could thresh wheat crop efficiently. The peg type cylinders are being used in latest wheat threshers in India for threshing wheat as well as making good quality bhusha. Keeping the above points in view a small wheat thresher having capacity of 1-2 qt/h was designed and fabricated for hill region in the Department of Farm machinery and Power Engineering Pantnagar. The peg type cylinder was selected for this thresher. The blower was mounted on the same shaft. The performance of the thresher was evaluated on four varieties of wheat crops UP-2425, UP-343, VL-616 and VL-738. The results reveled that the threshing efficiency, cleaning efficiency, collective loss, and visible grain damage, germination percentage are close to the BIS standard. The ranges of threshing efficiency of optimum combinations for selected varieties are 98.1 % to 99.36 while visible grain damage 3.6 % to 2%. The quality of bhusa (Avg. length of bhusa 18 mm) is lower than that recommended in BIS standard. The maximum capacity of thresher found to be 131 kg/hr in case of variety UP-343. The thresher is found to be useful for hill region. The power consumption of thresher was measured to be 2.4 kW. The operating cost of thresher is Rs. 9.98/h. The effect of peg orientation on cleaning efficiency and collective loss observed to be insignificant for variety UP-2425.ennullThesis