Classification
LWE - Agriculture - general aspects
LCM - Terrestrial ecology
9
LWV - Agriculture - plant protection
5
UHP - Protection of nature and landscape
3
LCMC - Plants - ecology
2
LVE - Food science - general
2
LWA - Agriculture - reference books
2
YUD - Comprehensive statistical data - Germany
2
LCL - Biotopes, ecosystems
1
LCN - Ecology - soil sciences
1
LER - Plant physiology - ecological aspects
1
LTH - Biotechnology - methods
1
UEF - Sustainability
1
UHN - Landscape ecology
1
UMV - Climatic change
1
UPK - Water resources, water supply
1
URA - Soil chemistry
1