Liquid Fertilizers Based on Dolomite,Nitric Acid,and Ammonia

Solubility in the system Ca(NO₃)₂-Mg(NO₃)₂-NH₄NO₃-H₂O was studied by the visual-polythermic method. The crystallization curves and the chemical composition of the solid phase were determined. The chemical composition of solutions with crystallization temperature of 0°C was calculated. A technological scheme for production of liquid fertilizers containing nitrogen, calcium, and magnesium was proposed.     

Physicochemical properties of a microelement fertilizer with amino acids

The physicochemical properties of the initial components and products were studied with the aim of production of a microelement fertilizer with an amino acid concentrate. The physicochemical properties of the amino acid concentrate and its influence on the stability and sorption properties of fertilizers enriched in microelements were studied.     

Reaction of Urea with Citric Acid

Reaction of urea with citric acid in aqueous solutions at molar ratios of 1 : 1, 1 : 2, and 2 : 1 and the solubility of urea citrate were studied. The data obtained can serve to optimize use of citric acid as a physiologically active substance or nitrification inhibitor and in production of liquid fertilizers containing urea.     

Physicochemical Principles of Synthesis of Liquid Fertilizers Based on Potassium Hydrophosphate

Technological prerequisites for obtaining special liquid fertilizers with potassium and ammonia hydrophosphates as components were studied. The solubility in the multicomponent (NH₄)₂HPO₄-K₂HPO₄-NH₄NO₃-H₂O and (NH₄)₂HPO₄-K₂HPO₄-CO(NH₂)₂-H₂O systems was studied. The chemical composition of the liquid compound fertilizers obtained was determined.