434 GRASSES AND HOW TO GROW THEM. 



Permanent meadows seldom require renewing, when 

 properly fertilized. Alfalfa, however, sometimes be- 

 comes weedy ; when it does, disking in early fall or iu 

 spring, according to locality, sowing more seed, and then 

 harrowing are very frequently followed by renewal. In 

 some instances, as on sandy or gravelly soils, the grasses 

 may fail in certain parts. When they do, disk them in 

 those parts, sow more seed at the best season of the year 

 for sowing it, and dress with fine manure. Treat simi- 

 larly spots that may have winter killed because of ice. 

 Yet again, when ploughing and harrowing may be neces- 

 sary, as in the cases of Russian brome and Bermuda 

 grass, renew these in that way as often as necessary. 



