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Flashcards in Soil Conservation Deck (12)
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1

the process when soil particles are detached from their original location, transported and deposited in a different location

Soil Erosion

2

Wearing away of the land surface primarily as a result of human activities or in some cases animal activities, much faster rate than geological erosion. Plowing, cutting, grazing, construction.

Accelerated erosion

3

Key drivers of erosion

Wind and water, topography

4

Response to Dust Bowl, planted trees to shelter wind. Windbreaks. One to five rows of trees planted on the western margin of a farm in a north-south line.

Shelterbelt Program 1935

5

Erosion control practices

Contour farming
Strip Cropping
Terracing
Gully Reclamation
Conservation Tillage

6

The mending of a gully by either physical methods (damns, boulders, cement) or vegetational means (shrubs)

Gully reclamation

7

Amount of topsoil losses during the year that is tolerable to the USDA, Average 4.7 tons per acre.

Tolerance Value

8

Factors that affect soil erosion

Rainfall
Runoff
Water Soluble Aggregates

9

plowing, seeding, cultivating and harvesting at right angles to the direction of the slope rather than up and down

Contour Farming

10

Growing crops that require different types of tillage such as row crop and cover crop, alternating strips

Strip Cropping

11

Steep slopes are converted into a series of broad based steps, runoff is retarded, soil erosion is arrested.

Terracing

12

the practice of restricting plowing of the soil to reduce the erosion and leave enough of the previous crop residues so at least 30% of the soil surface is covered when the next crop is planted.

Conservation Tillage