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Soil Conservation & Erosion Control Cheat Sheet
A printable reference covering soil erosion, runoff, contour farming, terracing, windbreaks, cover crops, and conservation tillage for grades 6-11.
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Soil conservation is the set of practices used to protect soil from being washed or blown away. This cheat sheet helps students connect erosion causes, land management choices, and solutions used on farms, slopes, construction sites, and natural areas. It is useful because healthy soil supports food production, clean water, biodiversity, and stable ecosystems. Students in grades 6 through 11 can use it to review the main erosion processes and compare common prevention methods. The most important idea is that erosion increases when soil is bare, loose, steep, dry, or exposed to fast-moving water or wind. Conservation methods work by slowing water, blocking wind, holding soil with roots, or keeping the ground covered. Key practices include contour farming, terracing, cover crops, mulching, windbreaks, riparian buffers, and conservation tillage. A simple way to think about erosion risk is: more slope + more runoff + less plant cover = more soil loss.
Key Facts
- Soil erosion is the movement of soil by water, wind, ice, or gravity.
- Runoff increases when rainfall rate is greater than the soil infiltration rate.
- A useful erosion risk rule is: erosion risk increases as slope, runoff, wind speed, and bare soil increase.
- Contour farming reduces water erosion by planting across a slope instead of straight up and down the slope.
- Terracing turns steep slopes into step-like flat areas that slow runoff and reduce soil loss.
- Cover crops and mulch protect bare soil by reducing raindrop impact, slowing runoff, and adding organic matter.
- Windbreaks reduce wind erosion by using rows of trees, shrubs, or barriers to slow wind near the ground.
- Conservation tillage leaves crop residue on the field, which protects soil and helps water soak in.
Vocabulary
- Soil erosion
- The process in which soil is removed and transported by water, wind, ice, or gravity.
- Runoff
- Water that flows over the land surface instead of soaking into the ground.
- Infiltration
- The process of water entering and moving through soil.
- Contour farming
- A farming method in which crops are planted along lines of equal elevation to slow water flow on slopes.
- Terracing
- A soil conservation method that cuts a slope into step-like levels to reduce runoff speed.
- Cover crop
- A plant grown mainly to protect and improve soil rather than to be harvested as a main crop.
Common Mistakes to Avoid
- Confusing weathering with erosion is a common mistake because weathering breaks rock or soil apart, while erosion moves the material to a new place.
- Assuming all runoff is harmless is wrong because fast runoff can carry soil, fertilizer, pesticides, and pollution into streams and lakes.
- Planting rows straight downhill on a slope is a mistake because it creates channels that let water speed up and remove more soil.
- Leaving soil bare after harvest or construction is risky because uncovered soil is easily hit by raindrops, dried by wind, and washed away.
- Thinking one conservation method works everywhere is incorrect because the best solution depends on slope, soil type, rainfall, wind, vegetation, and land use.
Practice Questions
- 1 A field loses 12 tons of soil in one year. After cover crops are planted, it loses 7 tons the next year. How many tons of soil were saved?
- 2 Rain falls at 30 millimeters per hour, but a soil can absorb only 18 millimeters per hour. What is the runoff-producing excess rainfall rate?
- 3 A farmer has a steep hillside with crop rows running downhill. Name two conservation practices that would reduce erosion and explain how each one helps.
- 4 Why does plant cover usually reduce both wind erosion and water erosion even when the plants are not grown for food?