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The Impact of Salinity on Soil Quality and Structure

This document explores how salinity affects soil quality, particularly focusing on the influence of sodium (Na) on soil structure. High salinity can lead to Na dispersion, causing soil aggregates to break apart and resulting in a sealed-off pore structure. This condition affects nutrient exchange, particularly with calcium (Ca) and magnesium (Mg), which are crucial for soil health. Additionally, the water retention properties of the soil change, hampering plant uptake and diminishing saturated hydraulic conductivity. These factors can drastically alter crop viability in salinized irrigated soils.

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The Impact of Salinity on Soil Quality and Structure

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  1. Salinity Does it Affect Soil Quality?

  2. * Soil Structure

  3. A Different View

  4. Well aggregated or Puddled due to Na dispersion

  5. Na salt affected…Na causes bonds in clay to break apart, become like mush, harden, seal off pores, soil om breaks down quicker, replaces Ca & Mg on exchangeable sites on clay micelles and competes for K uptake Soils remain more wet due to Na affinity for water taking away from the plants uptake ability Sat. hydraulic conductivity decreases Pores clog with dislodged silt or clay particles, bridging gaps in narrow/fine pores In salinized irrigated soils…

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