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