METHOD OF DETERMINING GRAIN LOSSES BEHIND HARVESTER Russian patent published in 2012 - IPC A01D41/127 A01D75/00 

FIELD: agriculture.

SUBSTANCE: method of determining loss of grain includes the measurement of width of the header capture, sampling of grain-straw mass with subsequent mathematical processing. The first sample of cut plants is taken from the area of the field in the form of a rectangle. The width of the rectangle is equal to the width of the rug placed on the entire cut area. The length of the rectangle is equal to the length of the rug close to the constructive width of the header capture. The rug is placed with its long side perpendicular to the direction of the combine. The first sample is threshed by hand and the mass of grain G_a is determined. The second sample is taken from the rug and the loss of grain is calculated behind the grinder G_g by multiplying the mass of grains of the second sample m₂ by the ratio of length of the rug l_r to the actual widths of the header capture b_a after the passage of the harvester. The loss of grain is determined by the formula where L - is the loss of grain, G_g=m₂l_r/b_a - is estimated weight of grain behind the grinder, G_a - is the grain weight of sample cut from the field.

EFFECT: invention can be used to assess the quality of work of the grain harvester.

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