Landbrug og biologi
Alnus glutinosa
16%
carbon nitrogen ratio
91%
ecoregions
7%
environmental factors
7%
Eucalyptus
6%
evergreen trees
7%
forest litter
64%
forest soils
100%
forest trees
6%
humus
7%
leaching
6%
mineral soils
53%
minerals
9%
monitoring
3%
nitrates
5%
nitrogen
3%
peat
12%
peat soils
16%
Pinus
10%
Pinus halepensis
17%
Pseudotsuga menziesii
14%
Quercus ilex
16%
Quercus suber
16%
Robinia pseudoacacia
15%
soil types
6%
topsoil
47%
zoning
8%
Geo- og miljøvidenskab
analysis
5%
cork
12%
distribution
3%
ecoregion
11%
forest floor
99%
forest soil
86%
humus
10%
indicator
11%
leaching
7%
locust
13%
mineral
47%
monitoring network
10%
nitrate
6%
nitrogen
5%
oak
19%
peat
26%
peat soil
12%
pine
24%
soil
16%
soil layer
18%
soil type
8%
topsoil
56%
trend
4%
zoning
9%