Phosphorus accumulation in saint lawrence river watershed soils: A century-long perspective

Agriculture & Biology

• Saint Lawrence River 100%
• phosphorus 48%
• basins 48%
• cropland 47%
• surpluses 42%
• soil 33%
• fertilizers 19%
• agricultural management 16%
• land management 16%
• water quality 12%
• long term effects 12%
• crops 6%

Earth & Environmental Sciences

• watershed 47%
• phosphorus 47%
• surplus 41%
• river 31%
• soil 27%
• basin 26%
• manure 25%
• fertilizer 22%
• budget 22%
• land management 12%
• census 12%
• tributary 11%
• agricultural land 10%
• crop 9%
• water quality 8%
• rate 8%
• comparison 5%
• effect 3%

Chemical Compounds

• Soil 55%
• Phosphorus(.) 54%
• Fertilizer 31%