10% of chokeberry is sugar, i.e. glucose and fructose, alcohol sorbitol. It gives a sweet taste to food and has the property of significantly reducing the amount of sugar in people with diabetes. Plant fruits are rich in P vitamins. The average amount of antacid pigments in the fruit is 6.4%. Aronia fruit is completely different from other plants due to the fact that its content is rich in trace elements. Its fruit contains boron, fluorine, iodine compounds, iron, copper, manganese, molybdenum compounds. The total alkalinity of its fruit is 1.3% lower than that of an apple. In addition, the aronia fruit contains pectin and flavoring agents, as well as glycoside amegdalin. Aronia fruit is the most antioxidant rich fruit among medicinal plants. With this feature, it belongs to the ranks of anti-aging products. The abundance of mineral substances, vitamins and biologically active substances in the aronia fruit is the cause of great interest in the study of its biochemical composition.
Determining the area and condition of the irrigatedlands intended for agriculture, whose condition has deteriorated due to the violation of irrigation and reclamation networks. For that reason, mineral fertilizers are considered the most important and necessary complex nutrient for any soil. In order to, processing and improving the quality of mineral fertilizers of this type is considered the most necessary measure for soil fertility.
In this work, cotton gin waste – CGW-phosphorus composts based on the waste of CGW and deposit Guliob phosphorite (GPh) were prepared, with wide mass ratios of CGW : GPh = 80 : 20; 75:25; 70 : 30; 65:35; 60 : 40; 55:45; 50 : 50; 45:55 and 40:60. The kinetics of the conversion of indigestible forms of phosphorus and calcium into a form assimilable for plants in poor GPh has been studied. It has been shown that an increase in the mass fraction of phosphate raw materials in relation to CGW leads to an increase in the content of the total form of phosphorus pentoxide in composts, but to a decrease in the relative content of the assimilable form of P2O5 and CaO. The longer the exposure time of CGW-phosphorite composts, the more forms of phosphorus and calcium digestible for plants.