METHOD FOR PROPORTIONALLY DIFFERENTIAL FERTILIZATION Russian patent published in 2017 - IPC A01C21/00 

FIELD: agriculture.

SUBSTANCE: method includes sampling for analysis, determination of plant food elements in soil samples. Proportionally differential fertiliser ratio is calculated with provision for the initial content of plant food elements in soil. The proportionally differential fertiliser ratio is introduced automatically using modern navigation tools. Soil sampling for agrochemical analysis is performed individually at intersections of grid lines with each other and with the boundaries of interfield plots which are pre-planned in the cartographic field contour. The onboard computer of the aggregate measures the distance from its location along the trajectory to the nearest pair coordinate point with a relatively increased content of plant food element in soil, expressed in unit fractions of the distance between the pair points, and the proportionally differential ratio of the applied fertiliser is calculated according to a certain relationship.

EFFECT: increased accuracy of fertiliser application.

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