Agriculture & Biology
soil
68%
rock phosphate
33%
Thailand
32%
goethite
30%
clay
27%
Western Australia
26%
hematite
24%
bauxite
24%
minerals
22%
regolith
20%
clay fraction
18%
soil properties
17%
sandy soils
17%
fertilizers
17%
South Australia
16%
Oxisols
16%
sorption
16%
geochemistry
16%
crystals
16%
acid sulfate soils
16%
kaolin
16%
iron oxides
16%
phosphorus
15%
kaolinite
15%
quartz
15%
biochar
14%
Ultisols
13%
silicates
12%
apatite
12%
soil formation
12%
potassium
12%
tropical soils
11%
Cryosols
10%
rangelands
10%
sand
10%
topsoil
10%
iron
10%
rocks
10%
clay minerals
9%
kaolinitic soils
9%
smectite
9%
phosphates
9%
jarosite
9%
physicochemical properties
9%
oxides
9%
metals
9%
Kandiudox
9%
weathering
9%
sand fraction
8%
B horizons
8%
Earth & Environmental Sciences
soil
76%
goethite
37%
phosphate rock
30%
clay
29%
dissolution
26%
kaolin
26%
hematite
25%
fertilizer
22%
regolith
21%
Oxisol
19%
bauxite
19%
sandy soil
18%
mineral
18%
soil property
18%
Ultisol
16%
acid sulfate soil
15%
chemical property
15%
crystal
15%
iron oxide
15%
phosphate
15%
sorption
14%
dehydroxylation
14%
potassium
14%
transmission electron microscopy
13%
heavy metal
12%
biochar
12%
iron
12%
phosphorus
12%
oxide
11%
surface area
11%
water retention
10%
parent material
10%
metal
10%
acid
10%
kaolinite
10%
silicate
10%
apatite
10%
rangeland
10%
desorption
10%
quartz
10%
scanning electron microscopy
9%
aluminum
9%
calcareous soil
9%
topsoil
9%
material
9%
clay mineral
8%
oxalate
8%
sand
8%
effect
8%
Chemical Compounds
Soil
100%
Hematite
28%
Dissolution
20%
Fertilizer
19%
Mineral
18%
Dehydroxylation
16%
Bauxite
16%
Phosphate Rock
15%
Iron Oxide
13%
Phosphorus(.)
11%
Red
9%
Nickel Ore
8%
Sorption
8%
Heavy Metal
7%
Clay Mineral
7%
Humic Acid
7%
Amount
6%
Specific Surface Area
6%
Cation Exchange
6%
Chemical Transformation
5%
Surface Area
5%
Platy Crystal
5%
Organic Carbon
5%
Oxide
5%
pH Value
5%
Phosphate
5%
Acid
5%
Substitution Reaction
5%
Apatite
5%
Quartz
5%
Dimension
5%
Transmission Electron Microscopy
5%
Soil Amendment
5%