Agriculture & Biology
frequency distribution
100%
algae
76%
nutrients
57%
anthropogenic activities
25%
Bacillariophyceae
23%
highlands
21%
United States Environmental Protection Agency
15%
hydrochemistry
15%
environmental assessment
14%
environmental monitoring
13%
acid phosphatase
11%
land use
11%
alkaline phosphatase
10%
species diversity
9%
agriculture
8%
chlorophyll
8%
habitats
6%
Earth & Environmental Sciences
alga
79%
nutrient
62%
watershed
26%
diatom
21%
human activity
18%
attribute
17%
upland region
17%
phosphatase
13%
environmental assessment
12%
diversity index
12%
environmental monitoring
12%
water chemistry
12%
environmental protection agency
11%
chlorophyll a
10%
ash
9%
recommendation
8%
agriculture
8%
land use
7%
acid
7%
habitat
7%
program
6%
analysis
3%