Manure nitrogen crediting and management in the USA: Survey of university faculty

Agriculture & Biology

• animal manures 100%
• nitrogen 61%
• animal manure management 39%
• surface water 21%
• Land Grant universities 16%
• extension programs 14%
• groundwater contamination 13%
• national surveys 12%
• soil analysis 11%
• cropland 11%
• animal husbandry 11%
• cattle manure 11%
• research programs 10%
• livestock production 10%
• poultry manure 10%
• groundwater 10%
• water quality 9%
• calibration 9%
• beef 8%
• poultry 8%
• nitrates 8%
• livestock 7%
• injection 6%
• nutrients 5%
• testing 3%