226 SOILS AND FERTILIZERS 



ashes, and on others lime fertilizers, have been found 

 very beneficial. The manuring of grass lands must 

 be varied to meet the requirements of different soils. 

 Permanent meadows require different manuring from 

 meadow introduced as an important crop in the rota- 

 tion. Permanent meadows should receive an annual 

 dressing of farm manure or of a commercial fertilizer 

 containing phosphoric acid, potash and a fair amount 

 of nitrogen. 



309. Leguminous Crops. For leguminous crops 

 potash and lime fertilizers have been found of most 

 value. Analyses of clover and peas, show large 

 amounts of both potash and lime. Some crops 

 as clover fail 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 pro- 

 ducts which are destructive to growth. As the result 

 of growing leguminous crops and after their inex- 

 pensive food requirements are met, the soil is en- 

 riched with nitrogen and the phosphoric acid is 

 changed to available forms. 



310. Garden Crops. For general garden purposes, 

 there should be a liberal supply of plant food. Well 

 composted farm manure can advantageously be rein- 

 forced with commercial fertilizers. A liberal use of 

 manures 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 : 



