Landbrug og biologi
nitrous oxide production
100%
paddy soils
95%
drainage
74%
methane
71%
nitrogen fertilizers
33%
soil
27%
composts
27%
rice
24%
greenhouse gas emissions
20%
carbon
18%
straw
16%
corn straw
12%
dissolved organic carbon
12%
arable soils
10%
nitrous oxide
10%
water management
10%
soil organic carbon
10%
crop management
10%
growth chambers
9%
global warming
9%
mineral fertilizers
9%
mineralization
9%
soil quality
8%
production technology
7%
climate
7%
corn
5%
nutrients
5%
water
3%
Geo- og miljøvidenskab
nitrous oxide
76%
methane
56%
drainage
54%
soil
31%
rice
28%
fertilizer
28%
compost
25%
straw
25%
maize
14%
greenhouse gas emissions
14%
carbon
13%
production system
8%
soil quality
8%
dissolved organic carbon
7%
water management
7%
conflict
6%
global warming
6%
organic carbon
6%
mineralization
6%
crop
5%
nutrient
5%
nitrogen
4%
mineral
4%
climate
4%
experiment
3%
water
2%
effect
1%