228 FARMYARD MANURE [chap. vii. 



This figure, about los. per ton for farmyard manure, 

 is considerably higher than the usual estimate attached 

 to dung for purposes of valuation or of drawing up the 

 the balance-sheet of a manurial experiment ; it does, 

 however, represent what it will cost the potato or hop 

 grower who sets out to keep cattle solely for the purpose 

 of making dung. It is for him to decide whether he can 

 secure sufficient profit from the cattle themselves to 

 make it worth while to buy farmyard manure at such 

 a price. A big cake bill is indeed a great source of loss 

 on many farms ; unless the cattle themselves pay for 

 their food, the increased richness of the dung due to the 

 purchased food will not produce a very remunerative 

 increase in the crops. 



