224 



AGRONOMY 



Heading in. Many species, especially when young, make 

 such luxuriant growth that some of it needs to be removed in 

 order that the rest may ripen into strong wood. Removal of 



Photograph by H. L. Hollister Land Co. 



FIG. 165. A heavily loaded branch of currants 



the excess growth is called heading in. The peach, pear, crab, 

 and poplar are among those most frequently headed in, but 

 any rank-growing species may need it. When nearly all the 



