Biometric parameters and physical-mechanical properties of wheat and barley grown on dry lands

In Uzbekistan, wheat is grown on more than 120,000 hectares of dry land, and barley on about 65,000 hectares. Due to the development of animal husbandry on dry lands, along with the grain of wheat and barley, straw is in great demand and it is important to harvest it without losing it. Research is underway to develop a device that would load the straw coming out of it into the back of the combine into large trailers when harvesting grain on dry land. For this purpose, the physical and mechanical properties of wheat and barley grown on dry lands were studied. In dry lands of Uzbekistan, the average grain length in different varieties is mainly in the range of 70-80 cm, and the ratio of grain to straw is in the range of 1: 1.17 - 1: 1.48. The coefficient of friction of grains and ears is 0.34 and 0.32, which is 1.2-1.7 times less than the coefficient of friction of stalks and sawdust. The critical flight speed is 2.0-4.0 m/s in straw sections up to 50 mm in length, 5.0-6.0 m/s in 100 mm, and 12.0-19.0 m/s in sections larger than 100 mm.

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