Method and device used for presentation of deforestation. ...
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Answer:
What methods are used?
Slash and Burn Agriculture
Slash and burn agriculture is the main method of clearing trees for small farmers and plantation owners in the tropics. This is because it is the only way to efficiently remove unwanted plants, trees and organisms that rest in the desired land. The burning usually happens in the burning season from June to October. During this period, 20% of the fires in the world can be attributed to deforestation. The trees are cut down and then later burned in order to release the minerals in the trees back into the soil. Their minerals are needed in the soil because the soil in the tropics is very poor and nutrient deficient. However, the nutrients in the soil after the first burn only last for a few years, due to the rain washing them away and their use for agriculture. This can happen anywhere between 3 and 20 years after the tree is removed. At this time, in order for the farmer to keep turning a profit, he will need to clear a new section of land and start over again.
Clear Cutting
Clear-cutting a forest is removing all the trees and vegetation, regardless of species, leaving the land completely bare. Because nothing is left on the land, scientists have no idea how long it takes for the forest to recover. Clear-cutting is a method used both to clear the land and harvest trees for commercial logging purposes. Clear-cutting is the most destructive of methods because nothing is left but the soil, which is not even replenished by a burn.
Selective Logging
In selective logging, only certain trees are chosen to be cut down. Research shows that during selective logging, only about 3% of the trees are harvested. However in the process of harvesting that 3%, about 49% of the trees are damaged. The period of time it takes for vegetation to grow back in selective logging is relatively short, 50 years. This is because there are patches of tree left to disperse seeds and protect and shade sapling from the sun.
Perennial Shade Agriculture
Perennial shade agriculture, like selective logging, leaves large areas of forests intact, so the period of regrowth is also relatively short. Only small areas of trees and vegetation are removed in order to leave satisfactory shade for the crops. This method of deforestation is employed by farmers of crops such as coffee and chocolate, which need the shade of large canopy trees. Recurring shade for agriculture has one of the fastest recovery periods of a process of destruction.