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Paper Details

Correlations of Available Phosphorus and Potassium with Soil pH and Organic Matter Content at Different Soil Reactions Categories in Soils of Western Development Region, Nepal

S. Pandey1, K.B. Thapa2 and I.B.Oli3

Journal Title:Journal of Chemical, Biological and physical sciences
Abstract


In the year, 2011-2012 altogether 695 soil samples were taken from western development region of Nepal to analyze phosphorus, potassium, organic matter content and soil pH. From those samples, randomly 100 samples were selected in such a way that 25 samples were taken from each soil reaction classes (strongly acidic, slightly acidic, neutral and alkaline soils). For each soil reaction class, the mean of available phosphorus, available potassium, organic matter content and pH were calculated. In addition, the simple linear correlations between available phosphorus- organic matter, available potassium - organic matter, available phosphorus- pH, available potassium- pH and organic matter- pH were calculated for all the soil classes. The significance of the simple linear correlation was tested under 0.05 and 0.01 level of significance. The study revealed that the correlation of the available phosphorus to the organic matter content of the soil decreased in the order of neutral to slightly acidic to strongly acidic to alkaline soils. It is highly significant in neutral soils, while it is significant in slightly and strongly acidic soils. However, it is non- significant in alkaline soils. The correlation of available potassium to the organic matter content of the soil decreased in the order of neutral to slightly acidic to alkaline to strongly acidic soil. It is highly significant for neutral and significant for slightly acidic soils. However, it is non-significant for alkaline and strongly acidic soils. There is not any significant correlation of soil pH with available phosphorus and available potassium.

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