Land degradation is a decline in the quality of land. There are several major types of land degradation in Australia. Some of which are listed below:
Soil erosion occurs when large numbers of trees are removed from a small area. Normally, soil is held together by tree roots. However, when these trees are removed, there is nothing to hold the soil together, so when the wind blows the rich, fertile topsoil is easily blown away. Once this has occurred, crops planted on this land are of lesser quality and quantity, as there are less nutrients present in the soil. Sometimes this problem is so severe that crops can not be planted at all. This is a big problem to farmers, as their profits are greatly reduced. The only solution is to plant trees with strong roots in an effort to hold the soil togeth
Eutrophication is another form of land degradation. This affects the waterways, such as rivers. It occurs when large amounts of chemicals such as phosphates are put into the water from either industrial waste, fertilisers being washed by the rain into the water, or any other method the nutrients will either be used up, or heavy rain will wash them downstream, and the algae will die, and any surviving fish will return.
This allows the water to become full of nutrients. This excess of nutrients encourages algae to grow. This algae uses up oxygen from the water, which kills other live such as fish living in the water. Eventually,
The only way that we can resolve soil erosion is by leaving trees in a small area as is, and cutting down trees in big areas where trees aren't really needed. If
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