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accumulate salt acre of irri Adding Chemical Amendments adsorbed on adhered adsorbed sodium amendment is applied amounts of sodium arid regions bicarbonate boron clumps Crops vary widely drains favor salt buildup field floccu ganic matter gated land ground water ground-water table gypsum harmful ical Improving Soil Structure Irrigation water applied irrigation waters contain leach water leaching the soil linity method of irriga Moderately Tolerant permeability plant growth plant root zone positively charged particles rainfall Reac receive enough water replaces the adsorbed root zone leaches Saline Soils Saline-Sodic Soils Salt Accumulate Salt Problems Salt-affected soils Sensitive crops shallow water tables sodic soils sodium cations sodium or chloride sodium replaces sodium tolerance soil particles SOIL SALINITY soil struc Soils Be Improved Soils Be Recognized Soils Soils Soils that contain soluble salts spotty stand stunted Subsoil sulfur surface take water slowly Tillage Methods tion Tolerant crops toxic tural usually white crust