A soil fertility status inventory work was carried out in some villages of Khordha and Bhubaneswar blocks belonging to Khordha district located in the North-Eastern Ghats Agro Climatic Zone of Odisha, India. Results show that soil texture of the villages under investigation varied from loamy sand to clay loam. Clay content varied from 2.4 to 34.0 percent. Soil pH ranged between 4.24 and 6.93 and electrical conductivity of the entire study area remained below 1 dSm -1 . Soil Organic Carbon (SOC) content ranged between 1.1 to 11.6 g kg -1 . Available nitrogen content in these soils was found to be varying between 50.0 to 225.0 kg ha -1 . Available Bray"s phosphorus content varied from 11.3 to 2326.5 kg ha -1 . Available soil potassium content varied widely from 37.6 to 458.3 kg ha -1 . CaCl 2 extractable soil sulphur varied from 2.17 to 11.02 mg kg -1 . Hot water soluble boron content ranged from 0.91 to 2.68 mg kg -1 . All the figures in lower range were found in upland soils while the higher values for all the parameters were found in low land soils.

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This study characterizes soil physico-chemical properties of a toposequence located in the Patana block ofKeonjhar district of Odisha. Three different representative pedons situated at three different topographicpositions viz. foothill land, medium land, and stream terrace land were exposed for evaluating horizonwise soil physico-chemical characteristics. Results indicated that soil pH, clay, porosity, water holdingcapacity, soil organic carbon (SOC), exchangeable bases, and cation exchange capacitygradually increasedfrom higher to lower topographies, whereas a reverse trend was observed for bulk and particle densities.Significant positive correlations have been observed for soil porosity, water holding capacity, exchangeablebases, and cation exchange capacity with clay; base saturation and exchangeable bases with pH.In contrast,significant negative correlations of bulk density and particle density with SOC;pH and exchangeable baseswith exchangeable acidity were also observed.

While the methodology adopted to determine the potassium (K) releasing power of the soil in the laboratory quantifies the solution and exchangeable K, under field situations, the release from nonexchangeable K is trigged depending on the crop demands and K loses. In other words, a soil that may contain low levels of labile K may derive K from a non-exchangeable pool provided the level of non-exchangeable K pool is higher. Therefore, the response of the crop to K fertilization is more related to the shift in the equilibrium among the different forms of K rather than the amount of K available in the labile pool. An investigation was carried out in the farm soils of Pandit Jawaharlal Nehru College of Agriculture & Research Institute (PAJANCOA & RI), Karaikal to study different K-fractions. A total of 22 soil profiles were exposed and horizon wise soil samples were collected, processed and subjected to analysis. The results, thus obtained, were subjected to descriptive statistics, simple correlation and linear multiple regression analysis to establish the interrelationships of different fractions of soil K with other soil physicochemical properties.

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