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FORMS OF PHOSPHORUS UNDER LONG TERM FERTIUZATION TO SORGHUM-WHEATSEQUENCE ON VERTISOLS AND THEIR RELATIONSHIP WITH YIELD

H.N. Ravankar, Vijaya Bhagwat, P.A. Sarap

Affiliations

¹Department of Agricultural Chemistry and Soil Science. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola - 444 104, India

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Cite article:- Ravankar H.N., Bhagwat Vijaya, Sarap P.A. (2025). FORMS OF PHOSPHORUS UNDER LONG TERM FERTIUZATION TO SORGHUM-WHEATSEQUENCE ON VERTISOLS AND THEIR RELATIONSHIP WITH YIELD. Indian Journal of Agricultural Research. 38(3): 184 - 189. doi: .

ABSTRACT

The present investigation (2000–2001) was carried out during 13 cyde of Long Term Fertilizer Experiment started since 1988. There were 14 treatments replicated 4 times in RBD, comprised of NPK levels with and without FYM. Sulphur and Zinc. The results of the present study revealed that all the fractions of P evaluated (Sal. P, A1-P, Fe-P, Ca-P, R-S-P, Occl-P, IO-P and D-p) showed an appreciable P built up under 150% NPK and 100% NPK + 10 t FYM ha −1. The relative abundance of native P fractions in soil followed the order Ca-P > A1-P > R-S-P > Fe-P > Ocol-P > Saloid P. Results revealed that, there was significant increase in organic carbon, total N and available P to the extent of 76%, 25% and 80% respectively, than at the start of the experiment because of long term manuring and fertilization. Highest yield of grain and fodder/straw of sorghum and wheat were found in a plot receiving 100% NPK + 10 t FYM ha −1 followed by 150% NPK. Available P showed highly significant correlation with total P. Similarly IO-P, O-P, total P, Available P, Sal-P are highly significantly correlated with yield of crops.

KEYWORDS

REFERENCES

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