10. D.B.H. (diameter breast high) - Tree diameter in inches, out- 

 side bark, measured 4-1/2 feet above average ground level. 



11. Commodity production - The volume of timber harvested for 

 commodity use as expressed in commercial terms. 



12. Commodity drain - The commodity production adjusted for woods 

 and mill waste, etc., to conform with Forest Survey utiliza- 

 tion standards. 



13. Control point - Land Office section corners (in unsurveyed 

 areas idealized section corners as indicated on latest base map) 

 used to locate and define the boundaries of sampling strata and 

 sample segments. 



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