Keyphrases
Agricultural Land
25%
Animal Population
25%
Crop Acreage
50%
Crop Production
25%
Cropping System
25%
Fertilizer
25%
Flow Discharge
25%
Historical Factors
25%
Historical Land Use
25%
Historical Patterns
25%
Historical Trends
100%
Human Population
25%
Land Use Information
25%
Manure
25%
Metropolitan Areas
25%
Minnesota River
25%
Phosphorus
100%
Phosphorus Accumulation
25%
Phosphorus Application
25%
Phosphorus Discharge
50%
Phosphorus Fertilizer
25%
River Flow
100%
Row Crops
75%
Sediment Loss
25%
Statistical Methods
25%
Total Phosphorus
50%
Upper Mississippi River
100%
Wastewater Treatment Plant
50%
Earth and Planetary Sciences
Animal Population
25%
Crop Production
25%
Cultivation
25%
Farmland
25%
Land Use
25%
Metropolitan Area
25%
Minnesota
25%
Mississippi
100%
River Basin
25%
River Flow
100%
United States of America
100%
Waste Water Treatment Plant
50%