CHAPTER XIV 

 MANURE AND COMMERCIAL FERTILIZERS 



Stable Manure. Stable manure is the most valuable 

 fertilizer for growing vegetables ; and market gardeners 

 depend mainly upon it. It not only adds nitrogen, phos- 

 phorus, and potassium, the three essential elements of 



Keystone Vieic ('<>. 

 Fig. 185. Manure spreader followed by gang plow drawn by tractor. 



plant food, but also large quantities of vegetable matter to 

 the soil, which improves the texture of the soil and increases 

 its water-holding capacity. 



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