Earth & Environmental Sciences
maize
100%
cropping practice
61%
weed
55%
soybean
53%
air quality
53%
herbicide
52%
weed control
47%
agricultural ecosystem
47%
productivity
45%
crop rotation
44%
food
40%
alfalfa
36%
curriculum
34%
health impact
31%
particulate matter
31%
profit
30%
soil erosion
27%
damage
25%
grass
25%
education
25%
toxicity
24%
health
23%
sustainability
22%
loss
19%
nutrient
19%
organic carbon
17%
profitability
17%
air
16%
effect
15%
program
15%
soil
14%
life cycle
13%
crop yield
12%
environmental damage
11%
harvest
11%
crop
11%
fertilizer
10%
eutrophication
10%
atmospheric pollution
9%
human health
9%
pollution
9%
nitrogen
9%
agricultural practice
9%
leaching
9%
consumption
8%
runoff
8%
erosion
8%
nutrient loss
7%
Agriculture & Biology
agroecosystems
43%
air quality
42%
curriculum
42%
corn
42%
energy crops
37%
riparian areas
36%
ecosystem services
35%
education programs
34%
buried seeds
32%
bioenergy
32%
soil organic carbon
29%
cropping systems
27%
feedstocks
27%
weeds
23%
grasses
21%
pollution
18%
opportunity costs
17%
net primary productivity
12%
nitrous oxide production
11%
human health
11%
income
10%
greenhouse gas emissions
8%
crops
8%
university programs
8%
particulates
7%
life cycle (organisms)
7%
higher education
7%
biofuels
7%
oats
6%
environmental markets
6%
alfalfa
6%
climate
6%
fertilizers
6%
nitrogen
5%
phosphorus
5%
ecosystems
5%
waterways
5%
social benefit
5%
net ecosystem production
5%
British Columbia
5%
soybeans
5%
sustainable agriculture
5%
environmental health
5%
market prices
5%
conservation programs
5%
air pollution
5%
energy
5%
Medicine & Life Sciences
Air Pollution
73%
Midwestern United States
45%
Food
41%
Zea mays
41%
Particulate Matter
41%
Ecosystem
37%
Curriculum
29%
Global Health
28%
Air
23%
Agricultural Crops
21%
Fertilizers
19%
Education
18%
Health
16%
Life Cycle Stages
13%
Climate Change
11%
Costs and Cost Analysis
11%
Premature Mortality
9%
Cost-Benefit Analysis
9%
Income
9%
Nitrous Oxide
8%
Nitrogen
8%
Carbon Sequestration
7%
Crop Production
7%
Greenhouse Gases
7%
Nitrogen Oxides
6%
Renewable Energy
6%
Waste Management
6%
Volatile Organic Compounds
6%
Sulfur Dioxide
6%
Water Quality
6%
Biofuels
5%
Global Burden of Disease
5%
Social Values
5%
British Columbia
5%
Social Justice
5%
South America
5%
Livestock
5%
Equipment and Supplies
5%