Agriculture & Biology
chemical elements
49%
ecosystems
26%
food chain
75%
fractionation
59%
glucose
21%
isotope fractionation
100%
isotopes
71%
natural foods
42%
organic carbon
38%
organisms
20%
predation
28%
sand
29%
soil
35%
soil biota
42%
trophic levels
39%
Earth & Environmental Sciences
biological processes
22%
chemical element
27%
dilution
20%
ecosystem
13%
effect
5%
food chain
48%
fractionation
58%
glucose
21%
isotope
52%
isotopic fractionation
28%
microcosm
73%
organic carbon
18%
organism
16%
predation
21%
rate
7%
sand
14%
soil
29%
soil organism
31%
trophic level
23%
Medicine & Life Sciences
Biological Phenomena
22%
Carbon
23%
Ecosystem
26%
Food Chain
64%
Glucose
14%
Isotopes
76%
Sand
32%
Soil
76%