R. B. Sharma , G. P. Verma

Abstract

Soil moisture characteristics of some important solis of Madhya Pradesh with special reference to regurs were studied. The texture (silt+clay), cation exchange capacity and organic matter content appear to be the dominating factors influencing the moisture retention in these soils. Among tbe clayey soils, the Kamaliakheri series retained the maximum amount of available moistute while Baloda series the least. The amount of available moisture decreased when percentage of clay was >60. Of paddy growing soils, the Panagar soil retained more moisture than Raipur soils. A high amount of exchangeable sodium in an alkali soil seemed to be responsible for the higher available moisture content of an alkali soil as compared to normal soil of tbe same textural group. Statistical analysis of the data indicated that the available moisture in these soils was significantly correlated with silt+clay, cation exchange capacity and organic matter content, while negatively correlated with sand and hydraulic conductivity. The multiple regression equations were also worked out for estimating moisture characteristics.

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D. L. Kauraw , G. P. Verma , V. D. Tiwari

Abstract

The extent of aggregation in black soils belonging to different categories of toposequence was found to vary widely and it was comparatively greater in deep black clayey soil under haveli system of cultivation. On working out a correlation between various indices of aggregation and the important physical and chemical properties of these soils, clay fraction was found to be more important for the formation of water stable aggregates as compared to organic matter. Also, percentage of aggregates was found to be positively and significantly related to cation exchange capacity and increased with increasing concentration of exchangeable calcium and Potassium.

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