soil erosion. soil – an important resource soil erosion soil erosion occurs when soil is moved...
TRANSCRIPT
Soil ErosionSoil Erosion
Soil – An Important ResourceSoil – An Important Resource
Soil ErosionSoil Erosion Occurs when soil is moved Occurs when soil is moved from the place where it from the place where it formed.formed.
Harmful to vegetation.Harmful to vegetation.
Causes and Effects of Soil Causes and Effects of Soil ErosionErosion
Soil erosionSoil erosion Occurs when water or wind Occurs when water or wind picks up and transports picks up and transports sediments.sediments.
More common on steep More common on steep slopes and areas with little slopes and areas with little vegetation.vegetation.
Normally, soil is formed at Normally, soil is formed at the same rate that it is the same rate that it is eroded.eroded.
Causes and Effects of Soil Causes and Effects of Soil ErosionErosion
Increased by:Increased by: – Steepening of slopesSteepening of slopes– Lessening of vegetationLessening of vegetation– Human activitiesHuman activities
Agricultural cultivationAgricultural cultivation Forest harvestingForest harvesting OvergrazingOvergrazing Urban constructionUrban construction Strip miningStrip mining
Preventing Soil ErosionPreventing Soil Erosion
Prevention:Prevention: Crop managementCrop management– Shelter beltsShelter belts– Grazing or no till farmingGrazing or no till farming
During no till farming crops are During no till farming crops are seeded without plowing under the seeded without plowing under the stubble.stubble.
– Contour plowingContour plowing Planting along the natural contours Planting along the natural contours
of the land.of the land. Slows water and helps prevent Slows water and helps prevent
gullies.gullies.
– TerracingTerracing Steps are built into steep hillsides.Steps are built into steep hillsides.
– Construction practicesConstruction practices