DECIMAL CLASSIFICATION 
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Silvics 
Reaction of tree aggregates to environment 
Forest types and site qualities 
Methods of study and mapping 
Classification basis 
Origin and development 
Migration, invasion and establishment 
Succession 
Alternation and zonation 
Accessory forest vegetation 
Subdivided like 580 
Silviculture 
Natural production sistems 
Clear cutting Clean cutting 
By strips 
“ groups 
Seed tree method 
Cleard except for certain seed trees 
Selection method 
Cutting according to age or size 
Shelterwood method 
Gradual removal, by partial cuttings, of the shelter or seed trees 
Coppice or sprout method 
Coppice with standards 
[ntermediate cuttings 
Improvement cuttings 
Cleanings 
By animals ete. 
Liberation cuttings 
Thinnings 
Salvage cuttings Severance cuttings 
Pruning 
Marking 
Scratchers, bark blazers, bark gages, tree scribes 
Brush disposal 
Slash disposal 
Piling 
Top-lopping and scattering 
Burning 
Forestation 
General questions 
Tools and equipment 
Seed 
Production and source 
Collecting 
Extracting Cleaning 
Testing 
Storing 
Treatment of seed 
Chemic ete. 
Direct seeding 
Methods 
Protection 
Results