Relationship Between Some Soil Characteristics and Various Inorganic Phosphate Fractions of Soils of Rajasthan

One hundred and fifty five surface samples were collected from all the major soil groups of Rajasthan. Soils were analyzed for some important soil characteristics (pH, CaCO₃, organic carbon and clay content) and inorganic phosphate fractions. A number of correlations have been worked out. Correlations between pH and saloid bound phosphorus were negatively significant for clayey soils; pH vs iron bound phosphorus negatively for sandy loam, sandy clay loam and clayey soils and positively for pH vs calcium bound phosphorus in the case of sandy clay loam, and clay loam soils. Calcium carbonate content has provided significant positive correlations with calcium bound phosphorus and reductant soluble and occluded phosphorus in sandy loam and sandy clay loam soils. Significant correlations in case of organic carbon have been recorded for saloid bound phosphorus in sandy loam; aluminium bound phosphorus in sandy clay loam, reductant soluble and occluded phosphorus in sandy loam and iron bound phosphorus in sandy loam, sandy clay loam, clay loam and clayey soils.