Multiple benefits of manure: the key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms

Agriculture & Biology

• soil restoration 100%
• small farms 80%
• sandy soils 71%
• soil fertility 61%
• nitrogen fertilizers 60%
• zinc 35%
• minerals 33%
• calcium deficiency 31%
• base saturation 30%
• calcium 28%
• corn 27%
• superphosphate 27%
• clay soils 25%
• soil chemical properties 25%
• ammonium nitrate 25%
• soil organic carbon 25%
• mineral fertilizers 23%
• greenhouse experimentation 23%
• acidification 22%
• fertilizer application 21%
• tropics 20%
• phosphorus 16%
• farmers 15%
• nutrients 13%

Earth & Environmental Sciences

• smallholder 82%
• soil fertility 71%
• sandy soil 68%
• manure 64%
• farm 56%
• restoration 50%
• calcium 21%
• maize 17%
• zinc 15%
• superphosphate 13%
• mineral fertiliser 12%
• soil 12%
• fertilizer application 11%
• ammonium nitrate 10%
• mineral 10%
• acidification 9%
• tropics 8%
• chemical property 8%
• experiment 7%
• organic carbon 7%
• phosphorus 6%
• saturation 6%
• productivity 6%
• nutrient 6%
• nitrogen 5%
• resource 5%
• effect 4%