Agriculture & Biology
volcanic soils
100%
toposequences
84%
soil profiles
70%
land use
61%
Andosols
57%
Mexico
52%
volcanic ash
40%
soil formation
37%
hematite
37%
topography
26%
allophane
22%
gibbsite
21%
ferrihydrite
21%
soil classification
20%
halloysite
19%
soil
19%
Inceptisols
18%
Cambisols
17%
land use change
15%
laboratory techniques
14%
organic carbon
13%
forestry
13%
silica
12%
X-ray diffraction
12%
transmission electron microscopy
11%
spectroscopy
11%
minerals
9%
agriculture
9%
corn
7%
water
5%
Earth & Environmental Sciences
volcanic soil
88%
toposequence
73%
soil profile
60%
Andosol
55%
land use
42%
volcanic ash
28%
soil
27%
hematite
25%
material
20%
chemical
18%
topography
18%
allophane
18%
Inceptisol
17%
laboratory technique
17%
halloysite
17%
Cambisol
16%
volcanic belt
16%
ferrihydrite
16%
soil classification
16%
gibbsite
16%
in situ
15%
parent material
14%
breccia
13%
loss
13%
transmission electron microscopy
11%
forestry
11%
land use change
11%
maize
11%
marker
10%
spectroscopy
10%
silica
10%
X-ray diffraction
9%
organic carbon
9%
agriculture
9%
erosion
8%
world
7%
city
7%
resource
7%
mineral
7%
water
3%
analysis
3%