Agriculture & Biology
stover
34%
pastures
32%
Trifolium ambiguum
22%
solar collectors
18%
cool season grasses
18%
hydrology
18%
dairy heifers
17%
economic performance
17%
animal performance
15%
corn stover
15%
feedlots
14%
dairy herds
14%
suckling
13%
piglets
13%
soil properties
13%
drinking water
13%
sows
13%
heat stress
12%
shade
11%
corn
11%
Lotus corniculatus
11%
planting
10%
Trifolium pratense
10%
cows
9%
soybeans
9%
farms
8%
grazing
8%
tillage
8%
alfalfa hay
7%
soil organic carbon
7%
heat
7%
growing season
7%
soil
6%
heifers
6%
soil hydraulic properties
6%
alfalfa
6%
clay loam soils
5%
farrowing
5%
cropland
5%
infiltration rate
5%
Engineering & Materials Science
Ammonia
100%
Nitrogen fertilizers
28%
Greenhouse gases
27%
Fertilizers
18%
Renewable energy resources
17%
Hydrogen
16%
Gas emissions
16%
Agriculture
14%
Energy balance
14%
Life cycle
13%
Sustainable development
13%
Nitrogen
13%
Condensation
13%
Thermal energy
13%
Global warming
12%
Farms
11%
Energy utilization
11%
Propane
10%
Gases
10%
Students
9%
Metal halides
7%
Fossil fuels
7%
Product design
6%
Calcium chloride
6%
Electrolysis
6%
Reaction kinetics
6%
Ventilation
5%
Catalysts
5%
Energy storage
5%
Sorbents
5%
Earth & Environmental Sciences
ammonia
32%
harvest
24%
energy
21%
maize
21%
production system
19%
farm
17%
fossil
15%
wind power
15%
nitrogen
14%
greenhouse gas emissions
14%
tillage
13%
fertilizer
13%
life cycle
13%
energy balance
12%
low pressure
12%
soil property
11%
greenhouse gas
11%
soil
11%
hydrology
11%
aggregate size
8%
global warming
8%
rate
7%
soybean
6%
hydrogen
6%
hydraulic property
6%
fossil fuel
6%
reactor
6%
condensation
6%
gas
5%
chloride
5%
organic carbon
5%