Earth & Environmental Sciences
Turonian
100%
nitrogen fixation
62%
Cretaceous
62%
nitrogen
51%
carbon
38%
organic matter
34%
diagenesis
33%
ammonium
28%
hydrogen
26%
Cenomanian-Turonian boundary
25%
degradation
22%
Santonian
21%
dissolved inorganic nitrogen
21%
nitrogen cycle
20%
anoxia
20%
black shale
19%
index
17%
upwelling
15%
isotope
12%
protein
12%
phosphorus
12%
nutrient
11%
kinetics
10%
loss
9%
sediment
8%
water
5%
Physics & Astronomy
nitrogen
62%
cycles
57%
nitrogenation
55%
carbon
32%
shift
22%
anoxia
21%
upwelling water
19%
degradation
18%
shales
17%
nutrients
16%
hydrogen
14%
sediments
14%
phosphorus
11%
depletion
10%
isotopes
10%
proteins
9%
intervals
9%
kinetics
7%
water
6%
Chemical Compounds
Nitrogen Fixation
72%
Organic Matter
54%
Nitrogen
51%
Carbon Atom
32%
Nitrogen Cycle
28%
Ammonium
27%
Hydrogen
17%
Black
15%
Isotope
14%
Phosphorus(.)
14%
Protein
7%
Reaction Yield
6%
Time
6%