DATA FORM 



COMPREHENSIVE ONSITE DETERMINATION METHOD 



QUADRAT SAMPLING PROCEDURE 



(Saplings & Trees) 



Field Investigator(s): Date: _ 



Project/Site: State: County: 



Applicant/Owner: 



Transect # Plot # 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 



Sapling Species Status Cover Class Class Rank^ 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 



10. 



Sum of Midpoints 

 Dominance Threshold Number Equals 50% x Sum of Midpoints 



Basal 



Area (BA) BA Per 



Indicator DBH Per Tree Species 



individual Tree Species Status (inches) (sq ft) (sq ft) Rank^ 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 



Total Basal Area of Ail Species Combined 

 Dominance Threshold Number Equals 50% x 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 =1 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. Then cumulatively sum the midpoints 

 of the ranked species until 50% of the total for all species midpoints is immediately exceeded. All species 

 contributing to that cumulative total (the dominance threshold number) plus any additional species having 

 20% of the total midpoint value should be considered dominants and marked with an asterisk. 



B-12 



