THE INFLUENCE OF MAGNESIUM AND OF EASILY WEATHERED MINERALS ON HYDRAULIC CONDUCTIVITY CHANGES IN A SODIC SOIL

摘要: Summary Exchangeable Mg appears to have no specific effect on soil hydraulic conductivity of A and C horizons a sodic sandy loam (montmorillonite kaolinite clay minerals) leached with solutions which cause swelling be the dominant mechanism reducing (SAR < 20, electrolyte concentration 10 meq per litre). There is some evidence when these soils are subsequently water causes dispersion become important. Fresh loess in horizon dissolves percolating rainwater, causing difficulties replication experiments. It seems give small degree ‘self protection’ structure, property likely operating other affected by recent deposits.