Subject
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soil protection
6
soil science
6
sustainable development
6
sustainable use
6
wheat
6
GMO ( genetically modified organism )
5
biotechnology
5
biotope
5
corn
5
microorganism
5
nitrogen fixation
5
productivity
5
renewable energy source
5
soil water
5
sustainability
5
weed
5
biomass
4
cereal
4
developing country
4
economics
4
environmental impact assessment
4
environmental protection
4
erosion
4
food
4
mutation
4
pesticide residue
4
plant disease
4
political aspect
4
risk assessment
4
root
4
tropics
4
water pollution
4
Chemistry.
3
Food
3
Nutrition.
3
biological stress
3
biomass energy production
3
biosafety
3
chemical analysis
3
climatic impact
3
construction
3
energy crop
3
environment
3
environmental balance
3
environmental effect
3
evapotranspiration
3
evolution
3
future aspect
3
gardener
3
genetics
3
more ...