Table 5. Mean estimated cover for all plant species at Duck, 

 North Carolina, 1974. 



Treatment 





Plot No. 



Mean estimated 

 cover (percent) 



Bitter panicum (Hatteras) 





1 



75 







7 



80 







14 



80 



Bitter panicum (Ocracoke) 





5 



75 







11 



75 







16 



75 



Hatteras beachgrass 





4 



80 







12 



70 







13 



60 



Bitter panicum (Hatteras) 



plus 



2 



80 



Sea oats (Duck) 





9 



75 







17 



75 



Bitter panicum (Hatteras) 



plus 



3 



80 



Hatteras beachgrass 





8 



80 







15 



80 



Bitter panicum (Hatteras) 



plus 



6 



75 



Sea oats (Duck) plus 





10 



70 



Hatteras beachgrass 





18 



55 



1. Percentage of ground surface covered by shade as determined by 

 projecting area covered by vegetation groundward, based on five 

 1-square-meter sample subplots in each replicate (plot) per 

 treatment, n = 90. 



24 



