For wheat harvesting normally a combine is used. Irrespective of combine construction its basic functions are the same. It consists of mowing, threshing and purification section. During the wheat production and machine harvesting losses are unavoidable. Losses before harvesting occur due to the crop environment. Harve-sting took place on equal parcel in three repetitions and two different harvesting heights. First harvesting was performed at 2/3 plant height, which is at 15 till 20 cm above the ground, second harvesting was at 1/3 plant height, a socalled harvesting under the ear and was performed between 40 and 50 cm above the ground. Harvesting speed was higher during the under the ear harvesting and was in average 1,1 km/h faster than the harvesting at 2/3 plant height. Losses before the har-vesting were at 1,62%/ha that is 106,5 kg grain/ha. Losses during the harvesting were higher at under the ear harvesting and were in average of all combines 0,29% higher, level of broken grains was higher for 0,36% and impurity level in harvested crop increased for 0,35%. As a consequence, during the 18,5% faster harvesting we get higher losses at harvesting, more broken grains and more impurities.
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