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Ressource en sol --- Soil resources --- Dégradation du sol --- Soil degradation --- Érosion --- Erosion --- Conservation des sols --- Soil conservation --- Mulch --- Mulches --- Résidu de récolte --- Crop residues --- Culture itinérante --- Shifting cultivation --- Mexico --- 631.6.02 --- 631.544.7 --- 631.872 --- Soil and water conservation. Erosion control --- Cultivation under various coverings. Protection and covering of soil. Transparent sheeting. Mulching and mulches. Shelter plants. Windbreaks etc. --- Vegetable detritus. Leaves. Forest litter. Leafmould. Humus. Straw --- Theses --- 631.872 Vegetable detritus. Leaves. Forest litter. Leafmould. Humus. Straw --- 631.544.7 Cultivation under various coverings. Protection and covering of soil. Transparent sheeting. Mulching and mulches. Shelter plants. Windbreaks etc. --- 631.6.02 Soil and water conservation. Erosion control --- Erosion.
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