FERTILISER-AMELIORANT Russian patent published in 2016 - IPC A01B79/02 C09K17/00 

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture. Fertiliser-ameliorant includes natural zeolite-containing clay mineral with calcium carbonates CaCO₃, silica SiO₂, in presence of trace elements, wherein fertiliser-ameliorant used is Khvalynskiy clay of Caspian depression with content of clay minerals, including humus (1.5-2.5 %), organic carbon (0.5-1.0 %), CaCO₃ (up to 10 %) SiO₂ (up to 60 %), Al₂O₃ (20-30 %), magnesium elements MgO, exchange cations Na⁺, Ca²⁺, Mg²⁺, potassium isotopes ⁴⁰K, with average value of relative swelling 0.46.

EFFECT: invention allows to improve water-and-physical properties and soil structure, increases its biological activity and fertility.

1 cl