FIELD: agriculture, organophosphorus compounds. SUBSTANCE: invention describes phosphoric acid esters of the general formula (I; a-e) 
where n = 1; R1 means CH2; R means C2H5 (a); R1 means CH2CH2; R means ClCH2CH2 (b); R1 means n-C6H4CH2; R means CH3 (c), C2H5 (d); n = 2; R1 means CH2; R means CH2CH = CH2 (e) that are agents used for presowing treatment of seeds. Invention is used in soaking garden radish, pea, squash seeds in phosphorus acid esters an aqueous solution to be proposed. EFFECT: increased germination energy, improved germinating capacity of seeds. 1 tbl
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