Earth & Environmental Sciences
soil
38%
rainfed agriculture
30%
heavy metal
29%
mineralogy
28%
nickel
27%
crop
24%
arable farming
23%
copper
22%
sorghum
21%
sustainability
18%
floodplain
17%
flooding
16%
plain
16%
sludge
15%
environmental chemistry
15%
sodic soil
15%
maize
14%
semiarid region
14%
soil moisture
14%
organic phosphorus
13%
land tenure
13%
soil surface
12%
soil pollution
12%
arid environment
12%
vulnerability assessment
12%
transect
12%
rangeland
11%
environmental sustainability
11%
soil nutrient
11%
solute transport
11%
subsistence
11%
coal combustion
11%
wet season
10%
coal mining
10%
tailings
10%
livelihood
10%
pollution
9%
bedrock
9%
landfill
9%
fertilizer
9%
soil moisture regime
9%
border
8%
vegetation
8%
rain
8%
runoff
8%
agricultural land
8%
environmental impact
8%
mineral
8%
distribution
8%
calcium
8%
Agriculture & Biology
Botswana
100%
soil
27%
soil mineralogy
19%
urban soils
17%
land tenure
15%
organic phosphorus
15%
bedrock
15%
environmental sustainability
13%
cobalt oxide
12%
soil pollution
12%
floodplains
12%
pollution
12%
rangelands
11%
livelihood
11%
sludge
11%
soil sampling
11%
soil nutrients
10%
total nitrogen
10%
savannas
10%
nickel
10%
agricultural land
10%
wet season
9%
heavy metals
9%
quartz
8%
urbanization
8%
copper
8%
vegetation cover
8%
eddy covariance
7%
sulfides
7%
silicon
7%
petrographic microscopy
7%
Zambia
6%
vegetation
6%
cattle
6%
energy
6%
energy transfer
6%
arable soils
6%
agropastoralism
5%
illite
5%
smectite
5%
ecosystems
5%
Luvisols
5%
woodlands
5%
phosphorus
5%
Actinobacteria
5%
water
5%
kaolinite
5%
Engineering & Materials Science
Soils
43%
Heavy metals
34%
Mineralogy
31%
Nickel
19%
Soil pollution
18%
Copper
17%
Biological Availability
17%
Arid regions
16%
Coal combustion
13%
Nutrients
13%
Pollution
13%
Coal mines
11%
Environmental impact
10%
Lead
9%
Coal
8%
Leaching
8%
Contamination
7%
Minerals
7%
Chemical analysis
6%
Quartz
6%
X ray powder diffraction
6%
Air
5%
Smelting
5%
