58 



Here is the whole secret of the great success of the 

 English farmer. A green crop always comes in 

 between two grain crops. 



With bone dust, or super-phosphate of lime, we can 

 raise turnips as well as they can in England, and we 

 need not feed them to sheep, we can plow them in, 

 arid get more manure, than they would yield if eaten 

 bv animals. Then what else is needed ? We miss 

 the nitrogen from tho oil-cake. If more is required, 

 we must make that up some other way. Is not 

 nitrate of soda as cheap as oil-cake ? If not, then let 

 us plow in two green crops, or top-dress the wheat 

 with good barnyard manure. 



CHAPTER XIV. 



BARNYARD MANURE. 



One ton of barnyard manure contains 10 pounds 

 of nitrogen, 5 pounds of phosphoric acid, 12 pounds 

 of potash and 1500 pounds of water. 



It may be that you live so near to some town or 

 city, that you can get manure for $1,50 per ton, and 

 can haul it home and spread it for fifty cents a load. 



Now, as we have more faith in clover, than in any 

 other green manure, let us compare these two together. 

 You must put on 360 tons of manure upon the 20 

 acres, to get as much nitrogen as we have in the 

 single crop of clover. That will cost you $540 for 

 the manure. That will be nearly 20 cents per pound 

 for the nitrogen. I say nearly, for we must allow 

 something for the minerals. But how much ? Harris 

 says that : " All the mineral matter in a ton of barn- 

 yard manure could be purchased for 25 cents." 



