Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 24, Issue 3, 2022; Page No.(502-505)

NUTRIENT INDEXING OF OLSEN’S PHOSPHOROUS WITH RELATIONSHIP BETWEEN INORGANIC FORMS OF PHOSPHOROUS IN THE ALLUVIAL SOILS

MUTYALU SHESHU, AMREEN HASAN, TARENCE THOMAS, ARUN ALFRED DAVID, AKSHITA BARTHWAL AND RAGHU NANDAN SINGH KHATANA

Abstract

The phosphorous nutrient index value estimated in the soils along the Yamuna River in Prayagraj falls into the low to medium fertility class. The inorganic forms of phosphorous, namely aluminium bound phosphorous (Al-P), represented 2.15 percent of total-P, resulting in a relatively low proportion, while calcium bound phosphorous (Ca-P), comprised 31.57 percent of total-P. The correlation coefficient (r) between Olsen P and forms of phosphorous saloid P (S-P) was extremely high among all (r = 0.979*) and occluded bound-P (Occl-P) was significantly associated among the inorganic forms (r = 0.767*). This suggests that Occl-P has a significant contribution to the available phosphorous, it is said to be that from the forms of phosphorous Saloid P and Organic P values should be raised and it is recommended that soils with low content of phosphorous are advised to apply organic manures and supplemented by applying of phosphorous fertilizers in the specified crop to increase the levels of P in the soil.