66 SOME TYPES OF BRITISH WOODLANDS. 



establishing an underwood of beech in them. In this way, 

 again, fine oak can be produced, and the increment per acre 

 can be kept at the highest possible rate. 



Instead of beech, the silver fir has been used for under- 

 planting oak woods, a method which has given very good 

 results. In somewhat moist places, hornbeam has taken 'the 

 place of the beech. Spruce has also been used, but it is not so 

 good as the others, as the oak is liable to become stag-headed ; 

 the mixture is admissible under favourable conditions, or 

 where the spruce is to be cut out at a comparatively early age. 

 Oak has also been underplanted with "Wey mouth pine, and 

 with fairly good results. 



The rearing of ash and beech in mixture can be done as in 

 the case of oak and beech. The ash is either grown pure and 

 subsequently, at the age of twenty to thirty years, under- 

 planted with beech ; or the two are started at the same time. 

 In the subsequent thinnings, the ash is duly protected against 

 any attacks on the part of the beech. Frequently ash and oak 

 are planted together, mixed, and subsequently underplanted 

 with beech or silver fir. 



The rearing of larcli in !><'<<)/ is of special importance, now 

 that the larch disease has spread over the length and breadth 

 of Britain. Whatever the cause of the disease may be, suffice 

 it to say that its rapid spreading is due to the indiscriminate 

 planting of pure larch, especially in localities which are not 

 thoroughly suited to the species. It is now recognised in 

 Britain that larch should only be planted in favourable 

 localities ; that is to saj 7 , in a fairly rich soil, and on cool 

 aspects. Even then the formation of pure larch woods is 

 dangerous, because, if the disease breaks out, it will rapidly 

 spread over the whole wood. Hence, larch should be mixed 

 in moderate quantity with another species, which, as it were, 

 separates the individual larch trees. None is better than 

 beech. Here the larch has its best chance. The procedure 

 is to plant a limited number of vigorous larch plants into 

 beech, and let them grow up together, protecting the former 



