260 



Principles of Plant Culture. 



moving or cutting back tlie lower branches, and per- 

 mitting only a few branches to develop near the ter- 

 minus of the stem. a 



425. Pruning for den- 

 sity applies either to in- 

 creasing or decreasing the 

 density of the head. In 

 ornamental and shade 



trees, a compact head is fig. 159. Showing how to disbud 



shoots of some coniferous trees, 



often desirable, while in Picking out the terminal bud A 



in spring usually causes both the 



fruit trees, a head that adjacent lateral buds to develop. 



admits abundant light and air (Fie. 162) is important 

 (242). To increase density, encourage lateral branch- 

 ing by pinching 

 all the more 

 prominent ter- 

 minal growing 

 points (Fig. 

 ^ 160). In some 

 <^ coniferous trees, 

 such as the Nor- 

 way spruce,* 

 disbudding of the terminal 

 shoots (Fig. 159) in spring is 

 advisable, and in woody, plants 

 too tall for pinching, the more 



Fig. 160. Showing how den 

 Bity of growth is promoted 



inPpVncMng'S'^'the^frmfnai prominent terminal growing 



growing points. ^^^^^^ ^^^ ^^ ^^^ ^^^^ ^.^j^ 



the pole shears (431), which causes the head to grow 

 more dense. 



* Picea excelsa. 



