368 GRASSES AND HOW TO GROW THEM. 



tindiminished growth in each of a number of grasses, 

 comprising more than half a dozen varieties for a long 

 term of years. 



Indigenous and Introduced Permanent Pastures. — 

 These are composed of grasses, native to the country 

 or introduced, and in various combinations. Such, for 

 instance, is a permanent pasture, composed of Kentucky 

 blue grass, indigenous to Kentucky and certain of the 

 adjoining states, with orchard grass and white clover 

 added to the same; redtop, indigenous to the low-lying 

 lands of Minnesota, with timothy and alsike clover add- 

 ed; and western rye grass, indigenous to the American 

 and Canadian Northwest, with Russian brome added. 

 In growing permanent pastures, it should be the aim 

 to utilize valuable indigenous varieties to the greatest 

 extent practicable, since there can be no doubt about 

 the permanence of these. 



Duration of Permanent Pastures. — Although the 

 name would imply, that these pastures shall be grown 

 indefinitely, the idea must not be pressed too far. Some 

 of them are, of necessity, permanent as, when growing 

 on the uncultivable range, or in arable areas, where 

 cultivation is not practicable, because of stones or rocks 

 in the land, or because of the hilly or broken character 

 of the land. Some of them are, practically, permanent 

 from choice, as when grown on land, pre-eminently 

 adapted to growing these. Such are some of the pas- 

 tures of England, more than a hundred years laid down. 

 Again, permanent pastures are of limited duration. 

 They are sown on ordinary lands and are composed of 

 a limited number of grasses, which in time so decrease 



