74 CIRCULAR 3 3 3, U.S. DEPARTMENT OE AGRICULTURE 



Density of stand: This usually refers to light conditions, be- Abbrevi- Numerical 

 ing in effect a measure of the tolerance of the ground cover. atlon code 



It may be expressed in terms of the percentage of light reach- 

 ing the ground. This is recorded in tenths, by the use of 

 numerals 1 to 9. Complete density (10) is expressed by 0. 

 Very dense shade: complete canopy of tolerant species 



(e.g., dense spruce, hemlock, or beech) 1 



Dense shade: canopy with some holes, tolerant species 



not forming complete canopy 2 



Medium shade, such as is formed by complete canopy 



of intolerant species 3 



Half shade 4 



Open stand (less than half shade) 5 



Diameter: 



Breast height DBH 



Inside bark dib 



Outside bark dob 



Erosion: 

 Sheet: 



Slight 1 



Severe 2 



Shoestring: 



Slight 3 



Moderate 4 



Severe 5 



Gullying: 



Slight 6 



Moderate 7 



Excessive 8 



Exposure: 



Flat Ft 



North N 1 



Northeast NE 2 



East E 3 



Southeast SE 4 



South S 5 



Southwest SW 6 



West W 7 



Northwest NW 8 



Form: 



Class Fc 



Factor Ff 



Point Fp 



Quotient Fq 



Ground cover (may be recorded separately for grass, weeds, or 

 brush, or for individual species of each) : 



None 



Rare 1 



Scant 2 



Common 3 



Abundant 4 



Very abundant 5 



Height: 



Base crown BC 



Merchantable Mch 



Total Ht 



Increment boring Bo 



Two borings on tree 2Bo 



Three borings on tree 3Bo 



Injury: 



Disease — abbreviations for specific names of diseases or 



numerical code. 

 Fire: 



Basal scar Fs 



Crown scorched Fes 



(Express degree in percentage and use 1 to 10 

 under the Hollerith code.) 

 Heat killed Fx __ 



