Earth & Environmental Sciences
animal waste
97%
waste treatment
79%
pond
62%
irradiance
47%
biomass
44%
rate
24%
dry matter
19%
nutrient removal
18%
nitrate
17%
biochemical oxygen demand
17%
nitrification
14%
nitrogen
14%
removal
12%
temperature
12%
phosphorus
11%
piggery
11%
urea
8%
multiple regression
8%
photosynthesis
7%
acidification
7%
slurry
7%
nitrite
7%
chlorophyll
7%
chemical oxygen demand
7%
chlorophyll a
7%
ammonium
6%
environmental factor
6%
reactor
5%
Agriculture & Biology
waste treatment
100%
animal wastes
96%
biomass
39%
biochemical oxygen demand
35%
photoperiod
22%
nitrification
21%
dissolved oxygen
19%
absorbance
17%
biomass production
16%
nitrates
15%
temperature
14%
nitrite nitrogen
13%
chlorophyll
13%
ammonium nitrogen
11%
nitrate nitrogen
11%
alkalinization
11%
chemical oxygen demand
11%
total phosphorus
11%
nutrients
11%
pig manure
10%
Scotland
9%
acidification
9%
total nitrogen
9%
regression analysis
7%
urea
7%
photosynthesis
6%
phosphorus
6%
liquids
6%
environmental factors
5%