Abstract
AbstractIn a pot culture study, saw dust, vermiculite, lignite, magnesium oxide, wheat straw, paddy shell, ground nut shell and farm yard manure (FYM) were incorporated in to wet sandy loam and clay soils at the rate of 30 g/kg. Relative changes in soil structure and moisture retention were evaluated at the end of 160 day incubation period. All the amendments except vermiculite, ground nut shell and FYM in sandy loam soil and except vermiculite, lignite, magnesium oxide in clay soil significantly increased MWD and aggregates > 1 mm. Structural index was significantly improved by all the amendments except vermiculite and FYM in sandy loam and vermiculite and magnesium oxide in clay soil. Moisture retention and release in clay soil in the wet range (0 to 0.33 bar) were considerably increased by soil amendments except magnesium oxide, vermiculite and lignite. Almost all the amendments significantly increased moisture retention in the wet range in sandy loam soil. However, moisture release at 50 mbar was reduced only by wheat straw in sandy loam soil.
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