176 PKIKCiri,ES AXD PRACTICE OF PRUNING 



FIG. 131— DESIRABLE FORM OF GROWTH 



MADE BY TREE HEADED ABOUT 



2 FEET WHEN SET 



FIG. 130 



UNDESIRABLE FORM 



Free was headed 3 feet 



hiL;h when set. 



mcnt Station""' (Figs. 

 i:!7 to 144). Even 

 second-grade trees 

 may, with some ex- 

 tra work, be made to produce fairly well-formed heads, 

 as has lieen shown h_\- the Colorado Experiment Station 

 in the following condensed account. 



150. Actual experience pruning young trees.— Paddock presents an 

 interesting discussidii of some photographs (from which drawings 

 are herewith reproducedf"). to inx the points of the various stages 

 L'f pruning in the reader's mind. His article is condensed as follows ; 



The trees were second grade and evidently three years old when 

 planted. The lower laterals had all been pruned away in the nurs- 

 ery, so the tops were much too high for Colorado. There was also 

 difficulty in getting branches to form at suitable places to make the 

 selections for the head. However, the results are much better than 

 if the tops had been left as received from the nursery, as is so often 

 done. 



The trees 1, 2 and 3 in Figure 132 were headed back to about 21 

 inches in April. Had there l)een any laterals below this point they 

 would h,-i\'e been pruned liack to single buds, so clusters of lea-\'es 

 might have formed and thus provided some shade for the trunks. 



* Annual Report, 19(11. 

 t Colorado Bulletin 106. 



