A thermo-acoustical study to explore interactions between soil salts and fertilizer in view to control the soil salinity

Presence of excess salts in soil poses major problems to agricultural sector. Use of fertilizers is considered as a best solution to reduce soil salinity. The present work is aimed to study the effect of fertilizers on soil fertility in terms of fertilizer-salt interactions. For this purpose triple super phosphate (TSP) is being used which is a major source of phosphate. Density and sound velocity of triple super phosphate molecule and different saline salts were measured at different temperatures using different concentrations of each salt. From the measured experimental data thermo acoustical properties like molar volume, apparent molar isentropic compressibility, etc. were calculated. The effect of different parameters like salt concentration, temperature and fertilizer concentration on thermo acoustical properties of fertilizer solutions was studied and the results were explored in terms of solute-solvent and solvent-solvent interactions. Positive values of apparent molar volume showed strong intermolecular interactions in fertilizer-salt solutions.