Earth & Environmental Sciences
agricultural ecosystem
98%
carbon isotope
79%
maize
75%
isotope
63%
stable isotope
54%
growing season
38%
ecosystem
37%
advection
36%
canopy
34%
turbulence
32%
carbon isotope ratio
27%
soil respiration
23%
eddy covariance
23%
bare soil
23%
soybean
23%
soil condition
21%
soil temperature
21%
microbial activity
20%
photosynthesis
20%
partitioning
17%
fractionation
17%
tracer
16%
crop
15%
saturation
15%
effect
14%
substrate
14%
anomaly
14%
kinetics
13%
soil
9%
parameter
7%
method
4%
Agriculture & Biology
carbon isotopes
100%
agroecosystems
91%
cell respiration
85%
seasonal variation
73%
isotopes
57%
ecosystem respiration
45%
stable isotopes
44%
advection
44%
corn
26%
growing season
22%
canopy
22%
eddy covariance
20%
soil respiration
17%
photosynthates
17%
information sources
16%
microbial activity
14%
soil temperature
14%
tracer techniques
14%
soil quality
13%
fractionation
11%
Zea mays
11%
photosynthesis
10%
ecosystems
10%
soybeans
10%
kinetics
9%
methodology
7%
crops
7%
soil
7%