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Soil --- cartography --- Irrigation schemes --- Soil management --- Zambia
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Sediment transport --- Soil conservation --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Soils --- Agricultural conservation --- Soil management --- Fluvial sediment transport --- Stream sediment transport --- Transport, Sediment --- Erosion --- Control --- Prevention --- Conservation
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Agriculture --- Agronomy --- Food supply --- 330.34 --- 338.43 --- 633 --- 633 Field crops and their production --- Field crops and their production --- 338.43 Landbouweconomie --- Landbouweconomie --- 330.34 Economische ontwikkeling. Regionale economische ontwikkeling --- Economische ontwikkeling. Regionale economische ontwikkeling --- Crops --- Soil management --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Land use, Rural --- Congresses --- Research
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Soil conservation --- -Soil erosion --- -Agriculture --- -631.6.02 --- 631.6.02 Soil and water conservation. Erosion control --- Soil and water conservation. Erosion control --- Farming --- Husbandry --- Accelerated erosion --- Soils --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Congresses --- Tropics --- -Congresses --- Erosion --- Control --- Prevention --- Conservation --- Agriculture --- Congresses. --- 631.6.02 --- Agricultural conservation --- Soil management --- Soil conservation - Tropics - Congresses --- Soil erosion - Tropics - Congresses --- Agriculture - Tropics - Congresses
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Radioactiviteit --- Geologie --- Humus --- -Soil productivity --- -Soils --- -631.417 --- Earth (Soils) --- Mold, Vegetable --- Mould, Vegetable --- Soil --- Vegetable mold --- Agricultural resources --- Plant growing media --- Regolith --- Land capability for agriculture --- Productivity, Soil --- Agricultural productivity --- Crop yields --- Crops and soils --- Plant-soil relationships --- Soil fertility --- Soil management --- Muck --- Organic matter in soil --- Soil organic matter --- Soils --- Histosols --- Organic fertilizers --- Compost --- Plant litter --- Radioactivité --- Géologie --- Congresses --- Nitrogen content --- -Congresses --- Organic chemistry of soil --- Organic matter --- Composition --- Conferences - Meetings --- 631.417 Organic chemistry of soil --- Soil productivity --- Sols --- Productivité --- Teneur en azote --- Report --- Humus. --- Productivité. --- Teneur en azote.
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