DATA FORM 



INTERMEDIATE-LEVEL ONSITE DETERMINATION METHOD 



VEGETATION UNIT SAMPLING PROCEDURE 



(Trees) 



Field Investigator(s): ^^ Qalg. 



Project/Site: State: County: _ 



Applicant/Owner: Vegetation Unit #/Name:. 



Note: If a more detailed site description is necessary, use the back of data form or a field notebook. 



Percent Midpoint^ 



Indicator Areal Cover'' of Cover 



Tree Species (Percent Cover Option) Status Cover Class Class Rank^ 



1. 

 2. 

 3. 

 4. 

 5. 

 6. 

 7. 



Sum of Midpoints 

 Dominance Threshold Number Equals 50% x Sum of Midpoints 



Indicator Tally jQ,a( Basal -^ 



Tree Species (Basal Area Option) Status 1 2 3 4 5 6 7 8 Trees Area Rank^ 



1. 

 2. 

 3. 

 4. 

 5. 

 6. 

 7. 

 8. 

 9. 

 10. 



Basal Area Factor (e.g., Prism Used) 



Total Basal Area of All Species Combined 

 Dominance Threshold Number Equals 50% of Total Basal Area 



1 Cover classes (midpoints): T<1% (none); 1 = 1-5% (3.0); 2 = 6-15% (10.5); 3 = 16-25% (20.5); 4 = 26-50% 

 (38.0); 5 = 51-75% (63.0); 6 = 76-95% (85.5); 7 = 96-100% (98.0). 



2 To determine the dominants, first rank the species by their midpoints (or basal area). Then cumulatively 

 sum the midpoints (basal area) of the ranked species until 50% of the total for all species midpoints (or 

 basal area) is immediately exceeded. All species contributing to that cumulative total (the dominance 

 threshold number) plus any additional species having 20% of the total midpoint, or basal area, value 

 shoukJ be considered dominants and marked with an asterisk. 



3 The basal area for a species (on a per acre basis) is determined by dividing the total numtjer of 

 individual trees tallied for all tally cireas by the number of tallies and multiplying by the basal area factor. 



B-6 



