STOCKBRIDGE'S FOEMULAS. 47 



the papers of the day, because, as a loj'^al man to the Agri- 

 cultural College, I thiuk the public should get this information 

 through the official channel of publication. That is all there 

 is about it. I think if anything of value has been discovered 

 in connection with this matter, it is their property ; but if we 

 have learned anything at the College, the farmers of the Com- 

 monwealth should get it through the College report. That 

 seems to be the proper channel. There is no secret about it. 

 I am willing that my friends should have every one of my 

 formulas, but I am not willing that they should go out to the 

 public in this way. 



The form in which I have obtained nitrogen, potash and 

 phosphoric acid to compound for the nutrition of plants in 

 these experiments, has been in that of a neutral salt for the 

 nitrogen and potash, and a superphosphate for the phosphoric 

 acid. For root-crops and beans, I have used the potash in 

 the form of sulphate ; for grain and forage crops, in the 

 muriate form. No specific rule can be given as to the quan- 

 tity of the compounds to be used in preparing any of my 

 formulas, because the percentage of nitrogen, potash and 

 soluble phosphoric acid they contain is quite variable ; but 

 having learned the per cents, of the compounds, the required 

 quantity is easily ascertained. 



INDIAN-CORN FODDER. 



To produce two tons of corn-fodder per acre more than the 

 natural produce of land without manure, I should apply, of — 



Nitrogen, . 20 tfes., in form of sulph. ammonia, 24 per cent, 100 tfes. 

 Potash, . . 66 " " of mm-iate potash, 80 " 132 " 



Phosphoric acid, 16 " " of superphos, 18 perct. sol.acid, 128 " 



INDIAN CORN. 



The natural proportion between the grain of Indian corn 

 and its roots, cobs, leaves and stalks, is, for fifty bushels of 

 the former, at fifty-six pounds per bushel, four thousand one 

 hundred pounds of the latter, and to produce the entire mass 

 more than the natural product of the land, I use, — 



Nitrogen, . 64 lbs., in form of sulph. ammonia, 24 per cent., 320 lbs. 

 Potash, . . 77 " " of muriate potash, 80 " 154 " 



Phosphoric acid, 31 " " of superphos., 13 per ct. sol. acid, 248 " 



