Compressive, tensile and shearing strengths of sorghum (Sorghum bicolor L. Moench) stalks of three varieties CSV-20, CSV-23 and CSH-9 were determined. The compressive strength was highest for the variety CSV-20 followed by the varieties CSV-23 and CSH-9. The tensile strength of varieties CSV-20, CSV-23 and CSH-9 were observed as 1.27kN, 1.60kN and 2.40kN respectively. The stalk specimens were deformed in a quasi-static process at two loading rates (50 mm/min and 75 mm/min). The cutting force required for shearing of sorghum stalks, Ultimate cutting stress and Specific shearing energy were determined at three sections for three varieties. The mean of the force required for cutting upper section of stalk of all varieties at first and second loading rate was 241.66 and 243.83 N respectively. The Ultimate cutting stress at upper section of stalk for the variety CSV-20 at the first loading rate found more by 12.03 % as compared with the second loading rate. The UCS was found 35.13 % and 36.35 % more at 75 mm/min loading rate for the varieties CSV-23 and CSH-9 respectively. The mean values of cutting force required for middle section of stalk recorded as 303.36 N and 307.42 N respectively at first and second loading rate. The Ultimate cutting stress at middle section of stalk for the variety CSV-20 at first loading rate was increased by 33.42 % as compared with the second loading rate. The value of UCS was slightly increased by 6.81 % in case of the variety CSV-23. The trend of UCS was observed reverse for the variety CSH-9. The Specific shearing energy had increasing trend for the variety CSV-20 as the loading rate is increased from 50 mm/min to 75 mm/min. However, the reverse trend of SSE was observed in case of the varieties CSV-23 and CSH-9 for middle section of the stalk. The mean of the force required for cutting lower section of stalk of all varieties at first and second rate of loading was 358.58 and 541.92 N respectively. The ultimate cutting stress had increasing trend for all three varieties as the rate of loading is increased from 50 mm/min to 75 mm/min for lower section. The Specific shearing energy had increasing trend for the variety CSV-20 & CSV-23 as the loading rate is increased from 50 mm/min to 75 mm/min.