METHOD OF SOIL PREPARATION USING RIVER SAPROPEL AS FERTILIZER MATERIAL Russian patent published in 2025 - IPC C05F11/02 A01B79/02 

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture, in particular to agriculture and agrochemistry, and can be used to improve soil fertility in biological agriculture. Method involves composting river sapropel with bird droppings for 2 months at ratio of 1:1. Obtained sapropel-compost fertilizer is applied on the production site and embedded in the soil in the first year at rate of 0.3 t/ha with disc harrows to depth of 15 cm. Mixture of green manure crops is sown from 50 % white lupine and 50 % yellow mustard; when mature, green manures are embedded in soil and fallow until the time of sowing soya as the main crop. After soya is harvested, sapropel-compost fertilizer is applied 0.6 t/ha and embedded by disc harrows to a depth of up to 15 cm, and winter wheat is sown. In the third year, after winter wheat harvesting, sapropel-compost fertilizer is applied to the production site and embedded in soil at rate of 1 t/ha with disc harrows to depth of 15 cm. Then one performs sowing of a mixture of green manure crops of 50 % white lupine and 50 % yellow mustard; after reaching maturity, green manure crops are embedded in the soil and left to fallow until the time of sowing grain maize as the main crop.

EFFECT: method increases soil fertility while obtaining high crop yields.

1 cl, 3 dwg, 6 tbl