What are features of shifting cultivation

MAIN FEATURES The following characteristics could be describe/explained. 1 Clearings made in the rainforest by cutting and firing trees (slash and Burn) 2 Largest trees often left because they are difficult to move and can provide a source of food in the form of fruit. 3. Ash is scattered after trees have been burned to fertilise the ground. 4. Little fertiliser is added apart from the ash, so the nutrient levels drop quickly leading to the cultivators abandoning the plot and finding a new one after 7-10 years. 5.Labour intensive little use of machines (some have chain saws). Crops tend to be planted using digging sticks. 6. Crops planting between remaining tree trunks which decompose slowly adding extra nutrients into the soil. 7.When the clearing is abandoned it is left for many years, allowing the vegetation to recolonise. 8.With a low population density this form of agriculture is sustainable. Like it