Agricultural lands are the ultimate places for the disposal of Agricultural wastes produced in thousands of tones every year. Apart from heavy metal contamination it caused serious non-point source of Phosphorus (P) loading on water bodies in many areas of the word. The ameliorative effect of P on plant growth under saline environment has broadened the scope of this hazard. Knowledge about the P release and uptake under sulphate (SO₄) salinity is very limited as compared to chloride (Cl) salts. Three different studies were conducted to evaluate the release and bio-availability of P from different P sources under chloride and sulphate salinity. First pot experiment was conducted with NaCl and Na₂SO₄ (75 and 150 mmolc L^-1) salt saturated soils. Phosphorus (P) was amended at the rate of 100 kg ha^-1 in the form of composted livestock manure (Po), KH₂PO₄ (Pi) and Po+Pi (Pc) along with the control. Wheat was used as a test crop. Chloride salt severely suppressed the plant grow than SO₄. Chloride salt was found more toxic for P uptake than the SO₄ salt and recovery percentage was also lower in Cl salt treated pots. Water extractable P in post harvested soil was higher in SO₄ salt treated pots. Combination of organic and inorganic P sources (Pc) gave better plant growth and higher P uptake than each source applied alone. However, phosphorus recovery was equally higher in Pc and Po sources than Pi treatment. In second laboratory experiment, soil was amended with three P sources and subjected to one salt and nine subsequent water extractions. Irrespective of the P sources, P release was substantially increased in the soils pre-saturated with salts as compared to the non-saline soil. Sulphate (SO₄) salts released higher amount of P in subsequent water extractions than chloride (Cl) and a synergistic effect has been observed between Na and SO₄ ions for P release. Phosphorus release differed for the salt types and P sources as Na₂SO₄ > NaCl > K₂SO₄ > KCl and livestock composted manure (Po) ≈ KH₂PO₄ (Pik) > Control > Ca(H₂PO₄)₂ (Pic), respectively. Biological available P (extracted with NaHCO₃) was higher in Cl than SO₄ salt treated soils while P sources did not differed significantly. Most of the Al and Fe associated P fractions (extracted with NaOH) were recovered in control followed by Pik and Pic. A substantial amount of stable Ca associated P fractions were extracted with HCl however P sources and salt types did not differ. Third study was conducted to evaluate the release of P in the leachate by Cl and SO₄ salt irrigations. Soil was amended with live stock manure, poultry droppings and sludge composts. Saline irrigation was done with Cl and SO₄ salts (60 mmolc L^-1) and leaching fraction of 0.2-0.3 was maintained. Sulphate irrigation substantially increased the P concentration in the leachate as compared to Cl salt irrigation. Phosphorus concentration in the leachate was higher in the pots amended with sludge compost followed by animal compost and P concentration gradually reduced in each subsequent leaching. It can be inferred from the studies that SO₄ salt has more ionic strength to replace the PO₄ ions than the Cl and P release depends upon the type of P source rather than the quantity of P applied.