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Agriculture --- Cropping systems --- Soil management --- Acid soils --- Farm mechanization --- Soil fertility --- Botany --- Research --- agriculture --- 631.452 --- 631.51 --- (883) --- $?$91/02 --- Soils --- Soil science --- Agronomy --- Fallowing --- Fertilizers --- Soil productivity --- Agricultural mechanization --- Mechanization, Agricultural --- Mechanization in agriculture --- Mechanized farming --- Power farming --- Mechanization --- Agricultural machinery --- Agricultural systems --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Food supply --- Land use, Rural --- Acidic soils --- Soil acidity --- Management --- Fertilization --- Fertilizer movement --- agriculture. --- Agriculture - Suriname --- Cropping systems - Suriname --- Soil management - Suriname --- Acid soils - Suriname --- Farm mechanization - Suriname --- Soil fertility - Suriname --- Agriculture - Research --- Botany - Research

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Humid tropics --- Humid tropics --- Acid soils --- Acid soils --- soil fertility --- soil fertility --- Rainfed farming --- Rainfed farming --- Tropical soils --- Tropical soils --- Mechanization --- Mechanization --- experimentation. --- experimentation --- Crops --- Crops --- Fertilizer application --- Fertilizer application --- Food crops --- Food crops --- Low fertility soil --- Suriname --- Suriname --- Low fertility soil