Agriculture & Biology
biological soil crusts
99%
nitrogen-fixing bacteria
78%
nitrogen fixation
66%
Clostridiaceae
35%
Cyanobacteria
28%
ecosystems
24%
Proteobacteria
23%
arid lands
23%
Ideonella
21%
microorganisms
14%
Shigella
13%
Klebsiella
13%
ecological function
12%
stable isotopes
11%
Pseudomonas
9%
ribosomal RNA
7%
nucleotide sequences
6%
nitrogen
6%
organisms
6%
DNA
5%
Medicine & Life Sciences
Nitrogen Fixation
100%
Soil
70%
Cyanobacteria
42%
Clostridiaceae
39%
Ecosystem
36%
Proteobacteria
29%
Shigella
13%
Klebsiella
12%
Budgets
12%
Pseudomonas
12%
Isotopes
11%
rRNA Genes
11%
Nitrogen
10%
DNA
6%
Earth & Environmental Sciences
soil crust
86%
fixation
63%
crust
49%
cyanobacterium
30%
arid land ecosystem
21%
microorganism
16%
arid land
14%
ecosystem
12%
stable isotope
9%
budget
9%
DNA
8%
gene
8%
family
7%
productivity
7%
organism
7%
nitrogen
6%