206 THINNING. 



the change, having been kept cool and in the shade 

 previously. 



7. Thinning, when done late, exposes that side of 

 the roots of a tree confronting the one cut down to an 

 undue strain from the prevailing wind, to the rupture 

 of the roots, and even blowing down of the trees. 



8. Mixed plantations are more difficult to thin and 

 manage at every stage of growth than plain ones, be- 

 cause the treatment that suits one species of tree does 

 not suit another. Pine and fir should be thinned in 

 early spring, while hardwoods should be thinned when 

 in full leaf. 



9. Thinning shelter plantations, belts, and groups, 

 should be done with the object of thickening them. 

 Thinning the stems is thickening the branches, and 

 the more trees are thinned, so long as the branches 

 are healthy and sound, the thicker the plantation be- 

 comes, although fewer trees are in it. 



10. The larch of all other species is most benefited 

 by thinniag, and will reproduce lateral branches when 

 far advanced in age. The oak, on the other hand, 

 though a hardy tree, stands thinning very badly when 

 advanced in age. 



