FIELD: ecology. SUBSTANCE: method involves addition of anion-active compounds to the soil at the dose 0.66-165.5 kg/ha of the general formula H-[-CR1R3-CR2R4-]n-[-CR5R7-CR6R8-]m-H where R1 OH, C(O)OH, C6H4-C(O)OH; R′-C(O)OH C(O)OH, C(O)OR9, OP(OH)2, C6H5; R2 H or C(O)OH; R5 H, C(O)OH, C6H4-C(O)OH, C(O)OR9, OP(OH)2, C6H5, OR10 or OH; R6 H or C(O)OH; R9 and R10 C1- C4-alkyl; R3, R4, R7 and R8 are independently H or C1- C4-alkyl. When one of R1 or R2 C(O)OH, C6H4-C(O)OH or their salt, then other H or C1- C4-alkyl, and when R5 or R6 C(O)OH, C6- H4-C(O)OH or their salt, then other H or C1-C4-alkyl; n 3-100; m 3-100. EFFECT: improved method of harmful decrease in soils. 3 cl
