174 BULLETIN 1C39. U. S. DEPARTMENT OE AGBICULTUBE. 
Summary of forest conditions affecting reproduction or the special tree under 
observation, as to shading, exhaustion of soil moisture, influence of herba- 
ceous vegetation, underbrush, etc 
Description of the special tree under observation as to size .growth, vigor, and 
reproductive capacity ; 
SOIL CHARACTER AXD MOISTURE SUPPLY. 
Depth of litter Character 
Depth of humus Present moisture =. 
Penetration of humus in mineral soil as shown by color, inches 
Character of subsoil, distinguished from soil 
Total depth of soil permeable to roots, inches __. 
Amount and kind of rock fragments in soil 
Character of impermeable substratum 
Soil origin i in situ, colluvial. alluvial, or eolian, and from what rocks) 
Composition and class 
Drainage Present moisture 
REFERENCES. 
Maps 
Reports- 
Photographs 
Environmental conditions measured 
Moisture samples Samples for analysis 
Soil analyses filed 
Observations by (date) 
