EFFECT OF GRAZING UPON ASPEN REPRODUCTION. 



19 



per acre (Plate V, fig. 1 ) . The condition of the sprouts before and after 

 grazing was noted on a transect 2\ feet wide and 40 feet long running 

 across the plot. The results are given in Table 8. 



Table 8. — Character and extent of sheep browsing on clear-cut aspen plot and height at 



which injuries were inflicted. 



Sprout No. 



Height 

 of sprout. 



Height 

 browsed. 



Condi- 

 tion of 

 sprout. 1 



Character of injuries. 



1 . 



Inches. 

 53.0 

 44.5 

 47.5 

 38.0 

 39.0 

 36.0 

 42.0 

 55.0 

 47.0 

 33.0 

 29.0 

 37.0 

 59.0 

 49.5 

 31.0 

 32.0 

 40.0 

 48.0 

 61.0 

 55.5 

 43.5 

 40.5 

 54.0 



50:0 



55.0 

 36.0 

 32.0 

 50.0 

 51.0 

 31.0 

 39.0 

 48.0 

 21.0 

 32.0 

 49.0 

 39.0 

 69.0 

 40.0 

 29.0 

 59.5 

 71.0 

 72.0 

 43.0 

 39.5 

 45.0 

 62.5 

 43.0 

 69.5 

 45.0 

 51.5 

 58.0 

 54.0 

 47.0 

 69.0 

 58.0 

 70.0 

 73.0 

 61.5 

 70.0 

 54.5 

 66.0 

 39.0 

 61.0 

 55.0 

 71.0 

 71.0 

 57.0 

 40.5 

 52.0 



Inches. 

 43.0 

 39.0 

 41.0 

 38.0 

 35.0 

 32.0 

 35.0 

 36.0 

 36.0 

 26.0 

 29.0 

 37.0 

 40.0 

 37.0 

 31.0 

 32.0 

 40.0 

 36.0 

 36.0 

 40.0 

 43.5 

 38.0 

 40.0 

 40.0 

 38.0 

 36.0 

 32.0 

 38.0 

 41.0 

 31.0 

 .33.0 

 42.0 

 21.0 

 32.0 

 38.0 

 39.0 

 40.0 

 40.0 

 29.0 

 45.0 

 40.0 

 41.0 

 43.0 

 37.0 

 39.0 

 39.0 

 43.0 

 38.0 

 45.0 

 40.0 

 41.0 

 44.0 

 47.0 

 44.0 

 45.0 

 45.0 

 43.0 

 36.0 

 40.0 

 42.0 

 40.0 

 39.0 

 40.0 

 38.0 

 42.0 

 45.0 

 32.0 

 34.0 

 35.0 



V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 



w 



V 

 V 

 V 

 V 

 V 



w 



V 



V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 



w 



V 

 V 



w 



V 



V 

 V 

 V 



V 



w 



V 

 V 



V 



w 



V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 

 V 



w 



V 



V 

 V 

 V 

 V 

 V 

 V 

 V 



w 



V 



V 

 V 

 V 

 V 

 V 

 V 



Laterals grazed. 

 Do. 



2 . 



3 



Do. 



4 





5 , 



Laterals grazed. 

 Do. 



6 



7.. 



Do. 



8 . 



Do. 



9 



Do. 



10.. 



Do. 



U . 



Laterals and terminal grazed. 

 Do. 



12 . 



13 . 



Laterals grazed. 

 Do. 



14 



15 



Laterals and terminal grazed. 

 Do. 



16... 



17 



Do. 



18 



Laterals grazed. 

 Do. 



19 



20 



Do. 



21 





22 



Laterals grazed. 

 Do. 



23.. 



24 



Do. 



25 



Do. 



26 



Laterals and terminal grazed. 

 Do. 



27 



28 



Laterals grazed. 

 Do. 



29 



30 



Laterals and terminal grazed. 

 Laterals grazed. 

 Do. 



31 



32 



33 



Laterals and terminal grazed. 

 Do. 



34 



35 





36 



Laterals and terminal grazed. 

 Laterals grazed. 

 Laterals and terminal grazed. 

 Do. 



37 



38.. 



39 



40 



Laterals grazed. 

 Do. 



41 



42 



Do. 



43 



Laterals and terminal grazed. 

 Laterals grazed. 

 Do. 



44 



45 



46 



Do. 



47 



Laterals and terminal grazed. 

 Laterals grazed. 

 Laterals and terminal grazed. 

 Laterals grazed. 

 Do. 



48 



49.. . 



50 



51 



52 



Do. 



53 



Laterals and terminal grazed. 

 Laterals grazed. 

 Do. 



54 



55 



56 , 



Do. 



57 



Do. 



58 



Do. 



59 



Do. 



60 



Do. 



61 



Do. 



62 



Laterals and terminal grazed. 

 Laterals grazed. 

 Do. 



63 



64 



65 



Do. 



66 



Do. 



67 



68 



Do. 

 Do. 



69 



Do. 







1 V indicates that the sprout was in vigorous and normal condition after grazing, 

 was weak and likely subsequently to die from the injuries caused by browsing. 



W signifies that it 



