Earth & Environmental Sciences
earthworm
100%
phosphorus
94%
soil
73%
grass
49%
surface area
40%
iron oxide
33%
ferrihydrite
33%
nanoparticle
32%
oxide
32%
soil organic matter
25%
struvite
23%
metal oxide
22%
nutrient uptake
22%
solubility
20%
drainage water
19%
meta-analysis
19%
nitrous oxide
18%
timber
17%
grassland
15%
phosphate
15%
porewater
15%
saturation
14%
drain
14%
biomass
14%
zinc
14%
soil water
14%
clay
13%
organic carbon
13%
chemical
13%
modeling
13%
iron
12%
heavy metal
12%
adsorption
12%
oxalate
12%
pipe
11%
ion
11%
fertility
11%
in situ
10%
sand
10%
topsoil
10%
extraction method
10%
effect
10%
superphosphate
10%
DTPA
10%
nutrient
9%
sludge
9%
agricultural soil
8%
complexation
8%
evaluation
8%
clay soil
8%
Agriculture & Biology
earthworms
91%
soil
59%
worm casts
58%
phosphorus
56%
grasses
44%
soil pore water
30%
magnesium ammonium phosphate
26%
nitrous oxide production
23%
smelters
23%
iron oxides
23%
meta-analysis
19%
soil organic matter
19%
soil fertility
19%
solubility
19%
biomass production
19%
nutrient uptake
16%
grasslands
16%
uptake mechanisms
16%
surface area
15%
fertilization (reproduction)
15%
dissolved organic carbon
15%
heavy metals
15%
Lumbricus terrestris
14%
zinc
13%
fulvic acids
12%
extracts
12%
oxides
12%
phosphates
12%
humic acids
11%
subsoil
10%
Lumbricus rubellus
10%
triple superphosphate
9%
nutrients
9%
soil sampling
9%
adsorption
8%
mineralization
8%
Aporrectodea longa
8%
nitrous oxide
8%
Aporrectodea caliginosa
8%
metals
7%
Allolobophora chlorotica
7%
greenhouses
7%
base saturation
6%
total organic carbon
6%
structural equation modeling
6%
cation exchange capacity
6%
seed mixtures
6%
soil chemical properties
5%
urea
5%
ionic strength
5%