DAIPtYINGL 7 



contains is saved to the farm if the skimmed milk is kept at home 

 or returned from the creamery in a condition suitable for feeding 

 calves and pigs. 



11. In the foregoing comparisons between butter and farm 

 crops it has been assumed that the casein, protein, and ash are of 

 equal fertilizing value, in all the products mentioned. An analysis 

 of these products, however, shows the exact amount of plant food 

 in each one of them. An average of some results of such analysis 

 is given in the following table. It includes not only the fertilizing 

 constituents but their value per ton. 



Fertilizing Constituents in Crops and in Dairy Products.* 



These figures show the advantages which butter selling has 

 over the disposal of other farm products, when the matter of soil 

 exhaustion is taken into consideration. 



12. According to the 12th Census, the value of the dairy 

 products of the United States amounted to $472,369,255. This is 

 more than the value of any one grain crop excepting corn (maiz), 

 which was $828,000,000, while wheat was $369,000,000, vegetables 

 $242,000,000, cotton $370,000,000, fruits $131,000,000, eggs $144,- 

 000,000. There was not much difference between our exports and 

 our imports of dairy products. These nearly balance each other; 

 the value of the imports being $3,500,000, "and the exports $4,888,000. 

 We import considerable cheese, and export condensed milk, as well 

 as small quantities of low grades of butter. Our exports of corn 



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