86 



EXPERIMENTS IN BLUEBERRY CULTURE. 



It should be stated here that those species of bhieberry which 

 spread by rootstocks, such as Vaccinium pennsylvanicum^ and other 

 related plants having the same habit, like the deerberry {Polycodium 

 stamineum) and the dwarf huckleberry {Gaylussacia dumosa), have 



Fig. 31. — Blueberry plant grown from a root cutting. (Natural size.) 



been reproduced without difficulty by rootstock cuttings. This 

 method is not generally applicable to the swamp blueberry, however, 

 as large plants of this species seldom produce rootstocks. 



FIELD CULTURE. 



(41 ) Experiments have been begun in the field culture of the swamp blue- 

 berry. 



While the results of the pot culture experiments are regarded 

 as highly successful and satisfactory, the experimental field plant- 

 ings made in 1908 and 1909 can not be said to have given more than 



193 • 



