Subject
plant
3
soil biology
3
agriculture
2
crop
2
fertilizer
2
nitrogen cycle
2
soil science
2
agronomy
1
carbon cycle
1
climatic change
1
efficiency
1
environment
1
erosion
1
fertilization
1
food
1
formula
1
global change
1
land use
1
mathematical model
1
nitrogen
1
nitrogen effect
1
nitrogen fixation
1
plant soil relationship
1
root growth
1
soil
1
soil chemistry
1
soil protection
1
susceptibility
1
water
1