The article presents the results of decomposition of substandard phosphorites at a non-full rate of nitric acid (10-50% of stoichiometry on CaO), followed by its processing by bird droppings in various ratios. The optimal parameters for obtaining organic mineral fertilizers are determined, the technological scheme is given and the material balance is calculated, the possibility of obtaining nitrogen-phosphorus-humus fertilizers based on substandard phosphorites and bird droppings is shown, by composition (wt.%): P2O5 total - 6.53; Р2О5 acceptable - 4.04; СаО total - 17.12; N - 4.21; organic matter - 28.38; humic acids - 9,12, fulvic acids - 5,25, water-soluble organic substances - 4,2; pН – 5,93.

This article presents the results of the physical and chemical properties of humic simple superphosphate obtained by decomposition of the ordinary phosphorous flour of the Central Kyzylkum with sulfuric acid and the addition of oxidized coal from the Angren deposit with hydrogen peroxide. The distinctive characteristics of humic simple superphosphate are shown in comparison with simple superphosphate obtained without the addition of oxidized coal.

In this article, the influence of acidic effluent (AE) neutralization process, the production of raw fatty acids of cotton soap stock, on the change in the applicability of phosphate powder (PP) and mineralized mass (MM), which are low-grade phosphorites of the Central Kyzylkum, has been studied. It was found that with wide changes in the mass ratios of AE : PP and AE: MM (from 100:10 to 100:40) at a temperature of 60 °C and a time duration of 30 min, the content of the relative assimilable forms of phosphorus in 2% citric acid are approximately from 1.95 to 1.63 and from 3.67 to 1.72 folds more with a content of 17.52 and 9.11% of the assimilable form of P2O5 for citric acid PP and MM respectively. Activated phosphorite obtained at a mass ratio of AE: PP and AE: MM = 100:20 was introduced into cattle manure at various mass ratios from 100:8 to 100:20 for composting for 3 months. The prepared mixture was moistened periodically with water to a moisture content of 65-70%. It has been established that with an increase in the content of activated phosphorite and the duration of composting time, it leads to an increase in the content of humic acids, fulphonic acids, and water-soluble organics in the compost products. On the other hand, the duration of composting tends to increase the degree humification above 60%. The approach of acid treatment and composting of carbonate phosphorites can be included as a promising technology for obtaining effective organomineral fertilizers for creating an organic garden in agriculture.