Landbrug og biologi
anaerobic digestion
100%
methane
83%
animal manures
81%
nitrogen fertilizers
78%
grasses
63%
digestion
48%
mineral fertilizers
45%
biomass
39%
inoculum
36%
legumes
35%
soil minerals
27%
spring barley
25%
bioenergy
23%
biogas
23%
soil
21%
mineralization
21%
cropping systems
20%
barley
17%
fertilizers
16%
plant growth
15%
fermentation
15%
carbon
14%
shoots
13%
nitrogen
12%
Geo- og miljøvidenskab
digestion
84%
manure
82%
fertilizer
74%
grass
73%
methane
65%
nitrogen
51%
barley
50%
biomass
39%
incubation
36%
mineral
35%
bioenergy production
29%
soil
27%
dry matter
25%
shoot
22%
cropping practice
21%
anaerobic digestion
21%
biogas
21%
fixation
21%
fermentation
19%
experiment
16%
mineralization
16%
crop
15%
substrate
14%
carbon
12%