of Nitrogen in a ton of different crops, as com- 

 pared with some of our standard fertilizers. It was 

 very kindly published, by Mr. Harris, in his " Walks 

 and Talks," No. 141, in the American Agriculturist. 

 It is as iollows : 



NITROGEN 

 IN ONE TON. 



Hungarian Millet, in blossom, . . 20 pounds. 



Green Clover, 12 " 



Green Rye ? 11 



Barnyard Manure, 10 ** 



White Mustard, 9 



Green Buckwheat, 8 " 



Green Corn, 6 " 



Turnips, 4 " 



Ground Raw Bones, 100 



Peruvian Guano, 280 



Nitrate of Soda, 300 



I have made one alteration in this table. I have 

 ascertained, from a recent analysis, that green corn 

 contains 6 pounds of Nitrogen, instead of 4 pounds, 

 in a ton. 



Now, let us examine into the real value of this 

 wonderful element, and also, of the other two, whose 

 merits are not far behind it. 



" Professor Johnson, after a very careful considera- 

 tion of the whole subject, estimates the value of the 

 ingredients of manures as follows : 



Potash, 7 cents per pound. 



Nitrogen, 30 " " " 



Soluble Phosphoric Acid, . . 16* " " " 

 Insoluble " " . . 6 " " " 



" Taking Prof. Johnson's figures, the Potash, Phos- 



