Influence of long term use of fertilizers and manures on available nutrient status and inorganic Phosphorous fractions in soil under continuous rice – rice cropping system.
- Regional Agricultural Research Station, Polasa, Jagtial Professor Jayashankar Telangana State Agricultural University, Telangana (State)
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Available status and inorganic ‘P’ fractions were studied in the ten year old Long Term Fertilizer Experiment on rice – rice cropping system at Regional Agricultural Research Station, Acharya N.G.Ranga Agricultural University, Jagtial, A.P, India. Available phosphorous content build up was observed where it was applied and its depletion where it was observed where it was not applied. The available phosphorous depletion was more under imbalanced fertilization (- 3.5 % from the initial status) than under control (4.9% decrease). Available phosphorous build up was highest with application of higher rate of fertilizer than optimum level (123% increase) and application of FYM along with optimum fertilizer (140% increase) . All the inorganic ‘P’ fractions increased over the initial levels where ever P fertilizer were applied and decreased where it was not applied. Available nitrogen content increased and available potassium content decreased in all the treatments with or without application of the respective nutrient.
[M. SRILATHA and S. HARISH KUMAR SHARMA (2015); Influence of long term use of fertilizers and manures on available nutrient status and inorganic Phosphorous fractions in soil under continuous rice – rice cropping system. Int. J. of Adv. Res. 3 (Jun). 960-964] (ISSN 2320-5407). www.journalijar.com
