REVIEW OF PRUNING AND TRAINING. 



249 



The bearing canes on the arm are to be stopped at the 

 usual height, while those on the main spur, and directly 

 over the stock, are allowed to grow above those on the 



Fig. 98. 



arm, and remain unchecked until later in the season. Now 

 it is plain that after these three canes have got above the 

 others, the sap will flow into them more rapidly than into 

 the others ; besides, the arm being bent, the flow of sap 

 into it is partially checked, while it can flow directly up- 

 ward without obstruction into the longest canes ; and this 

 diversion of the course of the sap takes place just at the 

 time the fruit on the arms need it the most. 



11* 



