294 SYLVICULTURE IN THE TROPICS 



l'T. IV 



When the fences or walls have been erected, a number 

 of herbaceous plants will begin to spring up and to 

 help in fixing the slopes. Some time is given to them 

 to start thus, and then the slopes should be planted up 

 with strong plants or cuttings, which will complete the 

 work except as regards upkeep. 



Where springs exist and their waters run down 





Fig. 94. 



unstable slopes, they should be trained from their source. 

 In the upper portions it may be sufficient to peg down 

 fascines along the bed and on the sides, but lower down 

 ] i.ived channels should be constructed of boulders 

 sufficiently heavy not to be easily torn out by the 

 rush of water. The banks of the watercourse should 

 be strengthened by means of wattle - fences, and from 

 distance to distance Hat horizontal paths may be cut 

 out and covered with stone slabs. Fig. 95 gives an 

 example of one of these watercourses which has been 



