FOOD REQUIREMENTS OF CROPS 269 



value. Analyses of clover and peas show large amounts 

 of both potash and lime. In some cases an application of 

 phosphate fertilizer is necessary before a crop of clover 

 can be secured. Farm manure on sandy or heavy clay 

 soils will materially assist in the production of clover. 

 Sometimes clover fails when grown too frequently upon 

 the same soil, not because the soil is exhausted but be- 

 cause of the development in the soil of organic products 

 which are destructive to growth. As- the result of grow- 

 ing leguminous crops, the food requirements of which 

 are inexpensive, the soil is enriched with nitrogen, and 

 the phosphoric acid is changed to available forms. 



324. Garden Crops. For general garden purposes, 

 there should be a liberal supply of plant food. Well- 

 composted farm manure can advantageously be ree'n- 

 forced with commercial fertilizers. A liberal use of 

 manure insures not only the maximum yield, but crops 

 of the best quality. Maturity of crops also is influenced 

 by fertilizers. 



Voorhees 89 recommends as a fertilizer for general gar- 

 den purposes one containing : 



This and similar fertilizers can be applied at the rate 

 of 1000 pounds per acre. To meet the requirements 



