Farm-level assessment of the nutrient balance in northern Nigeria.

Earth & Environmental Sciences

• nutrient balance 86%
• dry deposition 67%
• farming system 65%
• ruminant 51%
• farm 51%
• fixation 39%
• manure 38%
• intensive farming 29%
• crop 29%
• hedgerow 28%
• fodder 25%
• nutrient dynamics 25%
• rural population 24%
• soil fertility 21%
• population density 18%
• management practice 18%
• harvest 18%
• fertilizer 17%
• productivity 13%
• nutrient 13%
• land 11%
• product 9%

Agriculture & Biology

• dry deposition 100%
• nutrient balance 77%
• Nigeria 58%
• farming systems 49%
• small ruminants 46%
• farms 40%
• intensive farming 26%
• rural population 25%
• nutrients 24%
• crops 21%
• population growth 18%
• soil fertility 18%
• population density 17%
• forage 15%
• fertilizers 15%
• farmers 14%