Subject
sustainable development
agriculture
4
food production
2
biotope
1
crop
1
developing country
1
environmental balance
1
environmental protection
1
forestry
1
history
1
humus
1
irrigation
1
organic matter
1
plant ecology
1
research advancement
1
research and development
1
research center
1
research policy
1
socioeconomic aspect
1
soil
1
soil map
1
zeolite
1