11 



It will be noticed that the crops are nearly equal. The fer- 

 tilizer richer in potash gives 137 pounds more stover and 22 

 pounds less grain on the ear than the special. The financial ad- 

 vantage is with the former, for the application per plat costs $63 

 less, while the crop on two plats is worth SO. 40 more, making a 

 net gain on an acre amounting to $3.32. 



Wliite mustard as a crop for nitrogen, conservation has been 

 under trial upon one acre of corn. The seed is sown in the 

 standing corn early in August, and the mustard generally grows 

 until about the middle of November. It is then generally ploughed 

 in. The present is the third successive year of this trial upon the 

 same field. There is not as yet any considerable difference in 

 crops that is clearly attributable to the green manuring. The 

 yield of stover is this year somewhat larger upon the green ma- 

 nured portion of the acre ; that of corn slightly less. The figures 

 per acre follow : — 



Not green manured, stover, 3,748 pounds ; shelled corn, 55 bushels. 

 Green manured, stover, 3,894 pounds ; shelled corn, 54.4 bushels. 



Sulphate of 2)otash has been compared for the third season tvith 

 muriate of potash for potatoes. The results, as in previous years, 

 have been in favor of the sulphate. It has on the average given 

 the largest crop and tubers of the best eating quality. In this 

 experiment one acre of land was used. It was divided into four 

 plats, suitably separated by strips of land which were unfertilized. 

 To all the plats materials furnishing equal amounts of nitrogen 

 and phosphoric acid were applied. On two plats the source of the 

 potash applied was the muriate, on the other tlie high-grade sul- 

 phate ; equal amounts of actual potash to each. On two plats — 

 one sulphate and one muriate — all the fertilizers were put on 

 broadcast after ploughing ; on the other two they were all put in 

 the drill. 



The yields were at the following rates per acre : — 



Sulphate of Potash. 

 Broadcast: merchantable tubers, 248 bushels; small tubers, 20 

 bushels. 

 Drill : merchantable tubers, 268.4 bushels ; small tubers, 19.3 bushels. 



Muriate of Potash. 



Broadcast: merchantable tubers, 254 bushels; small tubers, 16.4 

 bushels. 

 Drill : merchantable tubers, 186.4 bushels; small tubers, 11.3 bushels. 



