An environmental assessment of cattle manure systems in the northern great plains

Agriculture & Biology

• environmental assessment 85%
• cattle manure 81%
• animal manures 56%
• corn 22%
• production technology 19%
• climate change 19%
• ammonia 19%
• climate 18%
• cattle finishing 17%
• nitrous oxide 13%
• greenhouse gas emissions 13%
• mineral fertilizers 12%
• fossils 12%
• environmental impact 11%
• leaching 11%
• clay 10%
• weather 10%
• life cycle (organisms) 10%
• nitrates 9%
• livestock 9%
• urea 9%
• fertilizers 8%
• phosphorus 8%
• farms 7%
• carbon 7%
• nutrients 7%
• energy 7%
• nitrogen 6%

Engineering & Materials Science

• Manures 100%
• Fertilizers 36%
• Climate change 31%
• Ammonia 30%
• Nitrates 17%
• Nutrients 17%
• Urea 17%
• Leaching 17%
• Phosphorus 17%
• Gas emissions 14%
• Greenhouse gases 14%
• Clay 13%
• Farms 13%
• Environmental impact 13%
• Methane 13%
• Nitrogen 13%
• Life cycle 12%
• Oxides 12%
• Carbon 10%
• Experiments 5%

Chemical Compounds

• Fertilizer 34%
• Ammonia 21%
• Simulation 17%
• Nutrient 15%
• Leaching 12%
• Phosphorus(.) 11%
• Methane 11%
• Urea 11%
• Nitrate 10%
• Nitrogen 8%
• Energy 6%
• Application 4%