THE LAWN 



67 



troublesome in the lawn. Manure that is taken from 

 henhouses is so strong that it must be used sparingly. 

 Preparing the soil. Spade the yard to a depth of six 

 inches. While spading, the manure must be worked into 

 the soil uniformly. Large clods must be broken with 



FIG. 43. Buckwheat Seed 



the spade. If the soil is prepared in April or May, it 

 may be seeded immediately, but it is usually advisable 

 to use the land for the production of a crop that will 

 give an abundance of vegetation and at the same time 

 provide the soil with a supply of nitrogen to serve as 

 food for the young grass. In latitudes south of Wash- 

 ington, D.C., cowpeas and soy beans may be used ; in 

 districts north of this, crimson clover, vetches, Canada 



