EXERCISE 45. A STUDY OF FARM FERTILITY 



1. What are the fertilizing ingredients in the manure worth, from a herd 

 of milch cows fed the following amounts of feed during a certain period : 



540 Ibs. oats 

 620 Ibs. Indian corn 

 210 Ibs. linseed meal (O. P.) 

 4040 Ibs. corn silage 

 2320 Ibs. red clover hay, 



the cost of the fertilizer elements being : nitrogen 18 c per pound, phosphoric 

 acid 4^c, potash 



2. (a) How much fertility would be sold if these feeds (except linseed 

 meal) were sold off the farm; (b) how much when the milk which was pro- 

 duced (1^2 tons) was sold for direct consumption, and (c) how much, if only 

 the butter made from this milk (testing 3.9 per cent) was sold, the skim milk 

 and butter milk being fed on the farm? 



(a) 



(b) 



(c).. 



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