Earth & Environmental Sciences
diffuse source
100%
hydrological change
95%
river basin
58%
nutrient
48%
agricultural land
29%
river
27%
land cover
15%
phosphorus
13%
broad-leaved forest
12%
rainfall
11%
nitrogen
11%
coniferous forest
10%
river discharge
9%
multiple regression
9%
thinning
8%
regression analysis
8%
dilution
8%
fertilizer
8%
phosphate
7%
nitrate
6%
effect
6%
runoff
6%
climate change
5%
trend
4%
soil
3%
Agriculture & Biology
nutrient transport
99%
nutrient content
65%
Japan
56%
rivers
50%
forest land
28%
land cover
28%
agricultural land
20%
regression analysis
18%
rain
16%
river flow
15%
total phosphorus
12%
arable soils
12%
runoff
12%
thinning (plants)
11%
coniferous forests
11%
total nitrogen
10%
climate change
8%
nitrates
8%
fertilizers
8%
phosphorus
7%
phosphates
7%
nitrogen
6%
testing
4%