AGRICULTURE 
A1S- 
634.928 
548 
2-5 
Form factors 
Species 
Subdivided like 634.972~.975 
Mesurement of feld trees 
! “ logs 
“ lumber 
“ other forest products 
33 
56 
57 
58 
93 
032 
Engineering 
Surveying 
Land surveying 
Topografic surveying 
Construction engineering Forest improvements 
Roads 
Trails 
Bridges 
Fences Hedges 
Bildings 
Lookout towers Special protectiv works Signaling 
Heliograf 
Electric construction 
Lighting and power lines 
Telegraf and telefone lines 
Hydraulic engineering 
Including reservoirs, dams and condits 
Drainage 
Irrigation 
Domestic waterpower development 
Forest botany 
Dendrology 
Subdivided like 381 
Ecology 
Relation to environment 
Biologic dendrology 
Relation of individual trees to environment 
Physiografic factors Site factors 
Light 
Temperature 
Precipitation 
Floods, inundations 
Humidity 
Wind 
Soils 
Soil physics 
“ chemistry 
* biology 
Bacteria 
Mycorrhiza 
Water relations 
Transpiration in relation to temperature, humidity, water and soil 
Climatic effects Acclimatization and adaptation 
Geografic distribution by species 
Subdivided like 583-585 
For geografic distribution bv locality see 634.9003~0 
7 
R2 
36 
Qn 
3 
94 
04.2 
046 
Q47 
> 
22 
23 
A 
25 
26 
27 
273 
274 
277