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