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The preceding table gives the nitrogen, phosphoric acid, potash and 

 lime content of some of the feeding stuffs found on the Massachusetts market. 



In mature animals, with the exception of milch cows, practically all of 

 the nitrogen, phosphoric acid, lime and potash consumed in the feed are 

 voided in the excreta. With milch cows a small part is retained in the milk. 

 For this reason any scheme for successful dairy farming should take inta 

 consideration the manurial value of the feeds used and should use, in so far 

 as consistent with careful feeding, those feeds which have the greatest fer- 

 tilizer value. Such a practice would cut the use of commercial fertilizers 

 to a minimum and they need be used only to supplement farm manures 

 occasionally. 



Manure is so valuable that both liquid and solid should be carefully 

 preserved and should not be allowed to waste through leaching, which will 

 happen if it is piled under the eaves of buildings or kept in an uncemented 

 cellar or pit. 



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