Landbrug og biologi
nitrogen fixation
84%
seasonal variation
71%
climate change
69%
vascular plants
56%
summer
54%
growing season
44%
cryptogams
42%
acetylene reduction
35%
terrestrial ecosystems
34%
Betula
29%
global warming
28%
Arctic region
28%
ethylene production
28%
lichens
27%
mosses and liverworts
26%
legumes
22%
climate
21%
autumn
21%
plastics
21%
vegetation
20%
phosphorus
20%
prediction
18%
winter
18%
nitrogen
15%
assays
14%
temperature
11%
methodology
7%
Geo- og miljøvidenskab
nitrogen fixation
100%
fixation
80%
seasonal variation
67%
climate change
48%
warming
29%
litter
21%
effect
19%
vascular plant
16%
growing season
13%
summer
12%
cryptogam
11%
acetylene
8%
lichen
8%
climate
8%
moss
7%
terrestrial ecosystem
7%
ethylene
7%
field experiment
6%
assay
6%
autumn
6%
plastic
5%
phosphorus
5%
cold
5%
in situ
4%
winter
4%
vegetation
4%
nitrogen
4%
prediction
3%
method
1%