Classification
571 - Physiology & related subjects
6
572 - Biochemistry
6
333 - Economics of land & energy
4
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
630 - Agriculture & related technologies
4
631 - Techniques, equipment & materials
4
660 - Chemical engineering
4
570 - Life sciences; biology
3
579 - Microorganisms, fungi & algae
3
577 - Ecology
1
578 - Natural history of organisms
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
664 - Food technology
1