Classification
580 - Plants (Botany)
620
630 - Agriculture & related technologies
130
571 - Physiology & related subjects
81
581 - Specific topics in natural history
56
577 - Ecology
41
579 - Microorganisms, fungi & algae
41
660 - Chemical engineering
38
570 - Life sciences; biology
36
572 - Biochemistry
29
631 - Techniques, equipment & materials
24
634 - Orchards, fruits & forestry
18
615 - Pharmacology & therapeutics
17
664 - Food technology
16
333 - Economics of land & energy
13
578 - Natural history of organisms
12
641 - Food & drink
12
547 - Organic chemistry
10
363 - Other social problems & services
9
620 - Engineering & allied operations
6
592 - Invertebrates
5
576 - Genetics & evolution
4
616 - Diseases
4
590 - Animals (Zoology)
3
610 - Medicine & health
3
006 - Special computer methods
2
519 - Probabilities & applied mathematics
2
551 - Geology, hydrology & meteorology
2
628 - Sanitary & municipal engineering
2
930 - History of ancient world to ca. 499
2
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
330 - Economics
1
501 - Philosophy & theory
1
550 - Earth sciences
1
582 - Plants noted for characteristics & flowers
1
612 - Human physiology
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
910 - Geography & travel
1