Subject
agriculture
106
agronomy
65
crop
57
plant breeding
34
soil
28
forestry
25
cultivated plant
18
green genetic engineering
18
ecosystem
17
food production
15
transgenic plant
15
fertilization
14
forest
14
ecology
13
fertilizer
13
plant
13
plant protection
13
soil chemistry
13
climatic change
12
plant ecology
12
plant growth
12
agricultural use
11
tree
11
forest decline
10
nitrogen
10
soil pollution
10
plant soil relationship
9
greenhouse gas
8
nutrient
8
nutrition
8
pesticide
8
plant physiology
8
pollution control
8
wood
8
climatology
7
genetic engineering
7
nitrate
7
potato
7
rice
7
soil microbiology
7
breeding
6
drought
6
landscape
6
renewable resource
6
soil biology
6
soil protection
6
soil science
6
sustainable development
6
sustainable use
6
vegetable
6
more ...