Li'i* Agricultural Chemistry. 



buy different materials which will serve practically the same as 

 feeds and yet vary greatly in their value as fertilizers. It is in- 

 deed often sane practice to sell some of the products produced 

 on the farm and with the money thus obtained purchase other 

 feeding materials. There is scarcely a farm on which such an 

 exchange could not be made to advantage. 



The following example will illustrate more clearly what is 

 meant. At the time of writing it was possible to buy on the 

 local market 6.4 tons of clover hay for the price of 5 tons oi 

 timothy hay, and 5 tons of corn could have been exchanged foi 

 4.6 tons of wheat bran. Calculating the value of fertilizing 

 materials in the manner already described, the results are 

 follows : 



Fertilizing value of 6 A tons of clover $ 48.55 



Fertilizing value of 4 . 6 tons of bran 57 . 32 



Total $105 87 



Fertilizing value of 5 tons of timothy $ 23.00 



Fertilizing value of 5 tons of corn 28 50 



Total $ 51.50 



Gain due to exchange s f>4 . :>7 



By a simple exchange of products without any cash outlay the 

 fertilizing value of the ration has been increased $54.37 and con- 

 sequently the manure produced would have been worth $43.49 

 more than that resulting from the use of corn and timothy hay. 

 This example is offered merely as a suggestion, which may be 

 made of considerable practical value, dependent on the market 

 prices of the various feeds. 



In the above example the actual feeding value has been in- 

 creased in the exchange due to the increase in protein in both 

 clover and bran, with no decrease but rather an actual gain ii 

 the dry matter purchased. 



Losses in manure. Barn yard manure is a perishable product 

 and must be handled with intelligence to obtain its maximum 

 v;i hi'-. 1 )oubtless as manure is handled on the majority of farms. 



