THE WHITE POPLAR 369 



if necessary, in spite of the risk of disease ; the Larch will 

 exercise no pruning effect on the Poplars. 



Poplars and Spanish Chestnut form an excellent mixture 

 in the proportion of about I to 10, though the Poplars will 

 have to be artificially pruned. 



In many cases it will be advisable to coppice the Chestnut 

 about every 25 years ; though on good Chestnut soils the two 

 should be able to grow to maturity. 



There is a good deal of simple coppice on clay soil consist- 

 ing chiefly of Chestnut, which should most certainly be planted 

 up with Poplars, as standards in high forest with coppice. 



Then again, over simple Alder coppice, Poplars should be 

 planted largely in many cases, and the quick-growing Alder 

 coppice shoots will naturally prune the Poplars. 



So also, Poplars over Ash coppice should be grown as high 

 forest with coppice on many soils, which are too stiff for 

 mature Ash. 



It should be noted that the necessity for artificial pruning 

 is largely avoided when Poplars are planted over existing 

 copice areas, owing to the very rapid growth of the coppice 

 shoots. 



Rotation. This should be short about 50 to 60 years. 



An average annual increment at the rate of 100 cubic 

 feet (q. g.) per acre is often grown. 



THE WHITE POPLAR OR ABELE. 



This is a native tree to this country. 



As to Seed. The seed ripens about the end of May ; 

 but the trees are, however, best raised from suckers, dug up 

 in the forest. 



Layering may also be adopted, but the best trees are 

 grown from suckers. 



Cuttings are not to be recommended. 



The timber is white and light, but not quite as good as 

 that of the Black Poplars just described. It is rather liable 

 to have " ring " shakes. 



Soil and Situation. The tree will grow on similar soils to 

 those described for the Black Poplars. 



2 A 



