Agriculture & Biology
acetylene reduction
24%
denitrification
68%
denitrifying bacteria
28%
desert soils
28%
fertilizers
14%
groundwater contamination
25%
methodology
5%
mineral fertilizers
19%
nitrates
15%
particle size distribution
21%
physical properties
15%
physicochemical properties
14%
rhizosphere
33%
semiarid soils
85%
sludge
62%
soil
28%
soil profiles
21%
total organic carbon
24%
vadose zone
100%
Earth & Environmental Sciences
acetylene
16%
bacterium
9%
chemical property
12%
denitrification
50%
desert soil
19%
digested sludge
18%
fertilizer
12%
groundwater pollution
17%
inorganic fertilizer
19%
laboratory
7%
method
3%
moisture
10%
nitrate
10%
particle size
10%
physical property
11%
rate
9%
rhizosphere
29%
sludge
42%
soil
24%
soil profile
13%
substrate
9%
total organic carbon
13%
vadose zone
59%