Landbrug og biologi
wood ash
91%
Picea abies
72%
Denmark
70%
ash (inorganic matter)
65%
nutrients
51%
leaching
44%
soil solution
41%
forest soils
39%
organic horizons
37%
plantations
35%
biomass production
35%
Scandinavia
33%
soil
33%
dosage
31%
willows
31%
nitrogen
27%
Abies nordmanniana
23%
magnesium fertilizers
23%
critical load
23%
tree nutrition
22%
heavy metals
21%
Christmas trees
21%
soil chemistry
19%
peat soils
19%
soil depth
18%
Betula pendula
17%
Quercus robur
17%
wood chips
16%
soil pH
16%
Fagus sylvatica
16%
nutrient management
16%
frost
15%
Geo- og miljøvidenskab
wood ash
100%
nutrient
51%
ash
49%
plantation
38%
forest soil
33%
soil
33%
inorganic nitrogen
27%
leaching
24%
Europe
19%
critical load
18%
soil chemistry
17%
nutrient uptake
17%
environmental constraint
17%
peat soil
17%
atmospheric deposition
17%
soil depth
16%
soil nutrient
15%
