Agriculture & Biology
fertilizers
100%
genetically modified organisms
99%
crops
69%
romaine lettuce
32%
pyrophosphatases
28%
water pollution
25%
nutrient use efficiency
24%
deserts
20%
nitrogen fertilizers
19%
minerals
16%
Lactuca
16%
Lactuca sativa var. capitata
15%
Gossypium
14%
natural gas
13%
air pollution
13%
ecosystem services
11%
Solanum lycopersicum var. lycopersicum
11%
Solanum tuberosum
11%
cropping systems
10%
genetic engineering
10%
growers
9%
plant tissues
9%
nitrates
9%
testing
8%
cotton
8%
potatoes
8%
potassium
8%
tomatoes
8%
Arabidopsis
8%
phosphorus
8%
phosphates
7%
economics
7%
shoots
6%
biomass
6%
nutrients
6%
energy
6%
nitrogen
6%
cultivars
6%
soil
5%