Earth & Environmental Sciences
maize
100%
ecosystem
81%
eddy covariance
72%
soybean
60%
growing season
45%
budget
44%
nitrous oxide
41%
methane
39%
fen
39%
isotope
37%
partitioning
33%
carbon budget
33%
peatland
32%
carbon
31%
water vapor
31%
canopy
30%
carbon dioxide
28%
evapotranspiration
28%
wetland
28%
boreal forest
27%
atmosphere
27%
flux measurement
27%
seasonality
27%
photosynthesis
26%
carbon balance
24%
drought
23%
summer
23%
soil
22%
mixing ratio
21%
soil respiration
20%
carbon isotope
20%
seasonal variation
20%
temperature
19%
crop
19%
winter
19%
primary production
19%
energy flux
18%
carbon flux
18%
productivity
18%
modeling
18%
net ecosystem exchange
18%
cropping practice
17%
tillage
17%
phenology
17%
agricultural ecosystem
16%
biosphere
16%
agriculture
16%
boundary layer
15%
soil temperature
15%
Agriculture & Biology
eddy covariance
66%
ecosystems
56%
ecosystem respiration
45%
carbon dioxide
41%
carbon
37%
soybeans
37%
net ecosystem production
37%
uncertainty
31%
global carbon budget
29%
isotopes
29%
corn
28%
gross primary productivity
26%
growing season
25%
seasonal variation
24%
cell respiration
23%
drought
23%
canopy
22%
soil respiration
22%
boreal forests
21%
fens
21%
photosynthesis
20%
diodes
19%
soil
18%
soil water
18%
lasers
17%
methane production
16%
water vapor
15%
methodology
15%
nitrous oxide
15%
treeline
14%
stable isotopes
14%
Picea mariana
14%
climate
14%
Corn Belt region
13%
temperate forests
13%
net ecosystem exchange
13%
cropland
12%
soil temperature
12%
wetlands
12%
carbon isotopes
12%
temperature
12%
cover crops
11%
agriculture
11%
winter
11%
crops
11%
forest litter
11%
Pseudotsuga menziesii
11%