Final answer:
Slash and burn farming is a practice where farmers set trees on fire to clear land for farming and improve soil fertility.
Step-by-step explanation:
The practice described in the question is slash and burn farming, which involves farmers setting trees on fire and allowing them to burn in order to clear land for farming. This traditional agricultural method is often used in tropical areas and it helps to clear vegetation and release nutrients into the soil, making it more fertile for cultivation.
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