WHERE FORESTS MAY BE GROWN 



259 



435. Absolute forest land, a cypress swamp. 



are prevented and the flow of navigable streams regulated; 



protection of wild life; tempering of physical conditions 



by regulation 



of water -flow in 



streams and lakes 



and elsewhere 



and by checking 



the sweep of 



winds; providing 



an attractive 



cover for large 



areas of the sur- 

 face of the earth, 



in which the 



people may find 



recreation and 



help. Areas that 



can be utilized for no other crop than forest are said to be 



absolute forest land (Figs. 434, 435) ; and much land that is 



available to some extent for pasture or other croppage 



may still be most profitable in forests. (Fig. 436.) Very 



special forests 

 (Fig. 437) may 

 be grown on 

 arable lands. 

 In the general 

 scheme or plan 

 of a farm, a 

 forest or wood- 

 lot may be an 

 essential part; 

 and likewise, in 

 a national 

 domain large 



436. Land that may be profitably used for forestry purposes. forest areas are 



