Corn cultivation 1 Corn fields 1 Cultivation 1 Deforestation 1 Forest soil 1 Forest soils 1 Iron 1 Land use 1 Land-use change 1 Landuse change 1 Maize cultivation Minimum data set 1 Nitrogen 1 Organic carbon 1 Quality assurance 1 Quality control 1 Red soils 1 Soil degradation 1 Soil quality index 1 Soils 1 Soils qualities 1 Tropics 1 agricultural land 1 cultivation 1 deforestation 1 fertilizer application 1 land use change 1 maize 1 red soil 1 soil degradation 1