Agriculture & Biology
airshed
100%
Sonoran Desert
71%
ecosystems
38%
winter
33%
nutrients
30%
urban soils
27%
rain
26%
Larrea tridentata
25%
desert soils
25%
winter annuals
22%
xerophytes
22%
metropolitan areas
22%
nitrification
20%
arid lands
18%
mineralization
16%
deserts
16%
soil organic matter
15%
nitrates
14%
climate
13%
microorganisms
11%
carbon
11%
nitrogen
9%
soil
8%
water
6%
Earth & Environmental Sciences
ecosystem response
62%
nutrient enrichment
61%
desert
42%
winter
30%
nutrient
24%
ecosystem
22%
soil
21%
perennial plant
18%
annual plant
18%
urban atmosphere
16%
rainfall
15%
metropolitan area
12%
functional group
12%
nitrification
11%
incorporation
10%
economy
9%
microorganism
9%
mineralization
9%
nitrate
9%
organic matter
8%
nitrogen
7%
carbon
7%
city
7%
resource
7%
climate
6%
loss
6%
rate
4%
water
3%
effect
2%
Medicine & Life Sciences
Ecosystem
56%
Soil
55%
Nutrients
43%
Larrea
23%
Nitrification
23%
Atmosphere
14%
Climate
14%
Nitrates
13%
Carbon
12%
Nitrogen
12%
Water
8%
Growth
6%