Fig. 7 — The 13 quarts of loiv-bush blueberries on the left were obtained from 



a 10 x 50 foot plot ivhen fertilized the previous year with 1000 pounds per 



acre of a 7-7-7 fertilizer. The check plot (unfertilized) yielded 



only 6 quarts from the same sized plot. 



A Low-Groiving, High-Yielding 

 Blueberry is Being Developed. Be- 

 cause of the danger of winter killing 

 high-bush blueberry plants when 

 their tops protrude above the snow, 

 attempts are being made to develop 

 a half-high plant by crossing a culti- 

 vated high-bush blueberry with se- 

 lections from the native low-bush 

 plants. So far, crosses between the 

 cultivated variety, Pemberton, and 

 native low-bush berries have pro- 

 duced some very promising, half- 

 high plants that greatly outyield any 

 native half-high plants that have 

 been brought under cultivation. 

 W. W. Smith 



A New Method of Pruning Apple 

 Trees is Being Tried. The usual 

 method of pruning apple trees con- 



sists of thinning out the dense groups 

 of small branches on the outside of 

 the tree to admit light; water sprouts 

 and crossed limbs and the weak wood 

 are removed in the process. Another 

 system, developed by the Michigan 

 Agricultural Experiment Station for 

 which remarkable results have been 

 claimed, consists fundamentally in 

 removing all of the thin wood inside 

 the tree with little pruning of the 

 outer branches. Both systems have 

 been tried at the University Horti- 

 cultural Farm for four years. No 

 significant differences were obtained 

 in yield, fruit size, or color. Be- 

 cause such widely differing systems 

 produced no important differences, 

 a new method is being tried which 

 is called "Pruning for Convenience". 



19 



