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3 Cards in this Set
- Front
- Back
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Commercial Farming (3.4) |
The North American Prairies. Problems that occurred- *increase salinity *soil erosion *limit of water How to solve- *Leaving bare soil for long periods were stopped or reduced. *Snow fences or barriers enabled snowdrifts to pile up which provide water then they melt in. *contour ploughing and strip cropping. |
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Subsistence Farming (3.4) |
As the Sahara advances and human population increases, there is more pressure on the land to produce enough food. Method- Putting stones in lines, along the contours of the land. Difficulty- Placing the stones along the contour line when the slope was shallow. Solution- Have a flexible transparent hosepipe filled with water. align the water levels at each end of the pipe, and place stones accordingly. Makes such a difference that seeds germinate in this moisture, rich organic soil and trees can be planted. |
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EIA Human Activity |
Chernobyl - Ukraine, April 1986 Nuclear contamination Human error- poor supervision Drawbacks with the reactor Increase in thermal power led to the two non-nuclear explosions. Distribution of airborne radionuclides across western Europe. Result- Contamination of soil, plants and animals |
