Soil Loss And Salinity Flashcards
Water contamination from
Sediments containing lots of phosphorus, nitrogen and pesticides.
Eroded sediments enter streams and lakes, they (2)
Collect in reservoirs, resulting in reduced water storage capacity.
Disrupt aquatic ecosystems.
Poor soil structure and lack of vegetation: (2)
High erosion susceptibility,
Planting trees can reduce wind speeds.
Dry soils are susceptible to
Wind erosion.
Clay sized dust particles are a
Human health hazard.
Soil loss through erosion results in a reduces quality as
Organic material and fine mineral particles are removed, reducing cation exchange and water holding capacity, as well as decreasing biological activity.
Soil salinity: salts originate from
Mineral weathering.
Soil salinity: high in
Dry environments, where evaporation exceeds precipitation.
Soil salinity: saline soils can be reclaimed by (3)
Establishing good internal drainage.
Leaching salts from the soil by applying good quality irrigation soil.
Improving the structure by replacing excess sodium with calcium from gypsum.
Reclaiming soils can be a
Difficult and lengthy process.
