Which of the following agricultural techniques requires land to be cleared every two years due to soil exhaustion? 1. Swidden agriculture 2. Terraced farming 3. Wet rice agriculture 4. Dry rice agriculture
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The agricultural technique that requires land to be cleared every two years due to soil exhaustion is: Swidden agriculture
- Swidden agriculture is also known as slash-and-burn agriculture, shifting cultivation, or milpa in Central America. This practice involves clearing a piece of land by slashing the vegetation and burning the remains, which adds nutrients to the soil temporarily through the ash produced.
- Once the nutrients are depleted, which typically takes a few years, the land becomes less fertile, and farmers move on to clear a new plot of land, leaving the old one to regenerate over time.