Nomadic pastoralism involves moving livestock between grazing areas, whereas slash-and-burn agriculture involves clearing vegetation, burning it, and cultivating crops on the cleared land. Both are traditional agricultural systems that can support low-density populations, but they use land and produce food differently.
This is core SL and HL content in IB ESS Subtopic 5.2, Agriculture and food.
| Feature | Nomadic pastoralism | Slash-and-burn agriculture |
|---|---|---|
| Main activity | Herding animals such as cattle, goats, sheep, or camels | Growing crops on temporarily cleared land |
| Movement | Herders and livestock move to find water and pasture | Farmers move cultivation to a new plot after soil fertility declines |
| Main output | Meat, milk, hides, wool, and sometimes trade animals | Crops for subsistence or local sale |
| Environmental mechanism | Movement prevents continuous grazing of one area, although excessive stocking can cause overgrazing | Burning releases mineral nutrients from biomass into ash, temporarily increasing soil fertility |
| Sustainable conditions | Low population density, controlled herd size, and enough time for grazed vegetation to recover | Low population density and a sufficiently long fallow period for secondary succession and soil recovery |
| Main risk | Overgrazing, soil erosion, and conflict over access to land or water | Deforestation, nutrient depletion, erosion, biodiversity loss, and carbon emissions if fallow periods become too short |
For example, pastoralist groups in the Sahel, including the Fulani, traditionally move herds seasonally in response to rainfall and pasture availability. Traditional shifting cultivation in parts of the Amazon Basin may allow forest regeneration when plots are small and fallow periods are long.
A common misconception is that both systems are automatically unsustainable. Their sustainability depends on scale, population pressure, land access, climate, and recovery time. Restricting pastoral migration or removing Indigenous communities from customary land can also create environmental justice concerns and may reduce sustainability.
Exam technique: For a “distinguish” question, refer to both systems throughout and identify the livestock-versus-crop difference. For “evaluate,” balance ecological impacts against social and economic benefits, use a named example, and reach a supported conclusion.