This sub-system is associated with the mobile sub-system on communal grassland. It often results from an evolution by sedentarization which has various causes : population increase, extension of agriculture linked with the necessity of stabilizing or improving food security, household production and income. Also for security and political reasons.
This evolution is generally linked with the reduction of the pasture areas available or its fragmentation, making continuation of the traditional pastoral system difficult.
Environmental impacts are more or less similar to those of the mobile sub-system. The specific environmental risks are associated with localized overgrazing due to insufficient mobility, as well as to the increase in livestock density allowed by complementary feeding using residues and by-products from cropping activities.
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