General techniques of forestry protection;

Injuries (except pests and diseases) caused by man, atmospheric factors, equipment, toxic chemicals

and other physical agents;

Materials, methods and programmes for prevention and control of forest injuries;

Forest fires: predisposing factors and causes, fire danger rating, fire prevention;

Techniques and programmes for forest fire detection and control;

Atmospheric effects on fires;

For: controlled burning, see K10

diseases of forest trees and their control, see H20

forest conservation, see P01

forest fire detection and control equipment, see N20

forest weeds, parasitic plants of forest trees and their control, see H60

pests of forest trees and their control, see H10

physiological disorders of forest trees, see H50

protection of forest products, see J12