580 



PROTECTION AGAINST WINDS. 



AV4 



t 



action of the wind precludes clear-cutting, establish narrow 

 cutting-areas. 



(b) Planting with balls of earth is advisable ; if planting is 



being done during a dry east 

 wind, the plants' roots should 

 not be exposed even for ten 

 minutes, unless they are 

 covered by damp moss. 



(c) Sowings should run 

 from north-east to south-west, 

 and soil should be heaped up 

 on the south-east side of the 

 lines, as shown in Fig. 244 ; 

 this secures the young plants 

 against frost and heat and 

 I is also the best protection 



against dry winds from the 

 j: east and south. It can, how- 



Fig. 244. ever, be employed only on flat 



ground, for sowings on slopes 



must always be horizontal, in order to prevent the soil and 

 seeds from being washed away by rain. 



(d) Mix conifers with broadleaved trees. 



(e) Belts of conifers 20 to 30 feet wide as in Fig. 245 should 

 intervene between broadleaved woods and cultivated land, and 

 should be established along forest 



roads. Corsican pine, spruce and 

 silver-fir are the best species for 

 the purpose, but if the soil is too 

 dry for them, Scots or Black 

 pines may be used. These pro- 

 tective belts are extremely use- 

 ful in sheltering woods from 

 drought and prevent the removal 

 of dead leaves by the wind, 

 damage by frost, etc. ; the exter- 

 nal trees should be allowed to branch down to the ground, 

 and along forest roads there should be a strip of land free 

 from trees beyond the belt, to prevent the roads from being 



OOO OoOOOOOOOO 



Fig. 246. 



a Broadleaved wood. 

 b Coniferous wood. 



