Concentrates of biologically active substances on the basis of the limited water-soluble inorganic and organic compounds and/or on the basis of the elementary sulphur, contain minimum 0.1 and maximum 85 % by weight of total solids of at least one from such biologically active substances, active in the nourishment and/or protection of plants, which are limited water-soluble. Further they contain 0.5 to 47 % by weight of dry matter of alkaline hydrolysate of collagen materials, of which the essential components are amino acids and low molecular peptides. The rest to 100 % by weight in the concentrate is at least one of the substances comprising water, an additive providing microbiological and chemical stability, a substance increasing agronomic efficiency of the suspension or pasty concentrate. The suspension or pasty concentrates contain as the limited water-soluble substance, at least one of hydroxides, oxides, carbonates, hydroxycarbonates, sulphites, sulphates, hydroxysulphates, hydroxychlorides, polysulphi
