Dynamics of phosphorus fractions in a calcareous Vertic Haplustepts under AICRP-LTFE soils.

Available status of P in LTFE soils was decreased after long run, but that was also increased in treatments where FYM application was there i. e. T 8 and T 9 . There was overall increase in inorganicP and total-P status, but status of available-P decreased due to calcareous soil, but due to chelating effect of organic material in treatments T 8 and T 9 there was increase in the availability of phosphorus after long run in the LTFE soils. Available-P status of LTFE soil at initial stage was low in category ( 56 Kg P 2 O 5 ha) from low category. After a span of 8 years most of the fractions of phosphorus depleted negatively i.e. increased in status, but there was also found positive depletion in case of Al-P, Fe-P, Ca-P and available-P, it might be attributed to transformation of phosphorus and plant uptake as an available-P. Application of FYM also prevents depletion in available-P status of soil. Research Paper : See end of the article for authors’ affiliations