Crop residue, manure and fertilizer in dryland maize under reduced tillage in northern China: II nutrient balances and soil fertility.

Agriculture & Biology

• nutrient balance 89%
• reduced tillage 89%
• organic soils 79%
• crop residues 76%
• arid lands 75%
• animal manures 66%
• soil fertility 64%
• nutrient management 54%
• fertilizers 53%
• China 44%
• corn 43%
• rain 36%
• phosphorus 34%
• long term experiments 28%
• cattle manure 27%
• corn stover 26%
• organic carbon 25%
• sorption 24%
• soil 23%
• cropping systems 22%
• soil organic matter 22%
• regression analysis 20%
• soil water 19%
• sowing 19%
• growing season 18%
• potassium 17%
• nutrients 13%
• nitrogen 13%

Earth & Environmental Sciences

• nutrient balance 100%
• crop residue 85%
• soil fertility 74%
• tillage 73%
• organic soil 73%
• manure 67%
• maize 62%
• fertilizer 60%
• nutrient 45%
• long-term experiment 29%
• rainfall 29%
• seeding 25%
• buffering 25%
• cattle 23%
• cropping practice 23%
• multiple regression 22%
• annual variation 22%
• soil organic matter 22%
• growing season 21%
• soil 19%
• potassium 19%
• sorption 18%
• soil water 18%
• organic carbon 18%
• phosphorus 16%
• nitrogen 13%
• land 13%
• index 11%
• experiment 9%
• analysis 6%
• effect 5%