106 HATCH EXPERTMKXT STATION. [Jan. 



more potash, the cro})S being corn and mixed grass and 

 clover in rotation. The crop of this year was mixed grass 

 andxilover. The result is a yield at the rate of 1,520 

 pounds per acre more on the fertilizer mixture containing 

 the greater amount of potash ; and this superior crop is 

 produced at a cost per acre for fertilizers of about $4 less 

 than the combination of materials used on the other plots. 

 The nutritive value of the hay from the plots receiving the 

 greater amount of potash is superior to that from the other 

 plots, on account of the greater relative abundance of 

 clover. 



X. — To determine the economic result of using in rota- 

 tion on grass lands : the first year, wood ashes and nitrate 

 of soda ; the second year, ground bone, muriate of potash, 

 and nitrate of soda; and the third year, barnyard manure. 

 The yields amount on the average to about 2 tons per acre, 

 produced at a cost for manure and fertilizers making their 

 application decidedly profitable. 



XI. — To determine which is the better practice, — to 

 spread fresh manure directly on the field during late autumn 

 or winter, or to put into large piles in the field at the same 

 time, these piles to be spread and iinmediately plo\ighcd in 

 in the spring. The field where this experiment is tried has 

 a moderate slope. The, crop of this year was corn, and the 

 results were on the whole quite favorable to the spring- 

 application, although the difference in the yield this year was 

 not sufiicient to repa}'^ the cost of the extra handling. 



XII. — To determine whether the use of nitrate of soda 

 for rowen is profitable. The application of nitrate to a 

 timothy sod at rates varying from 150 to 250 pounds per 

 acre gives a marked increase in every case, — an increase 

 more thaii sufficient to cover the cost of nitrate and its 

 application. 



XIII. — Variety test with potatoes. The varieties giving 

 yields exceeding 250 bushels of merchantable tubers per 

 acre, mentioned in the order of productiveness, are : Beauty 

 of Hebron (first generation from Maine seed). Beauty of 

 Hebron (second generation from Maine seed), I. X. L., 

 Steuben, Early Nancy, Million Dollar, Ensign Bagley, 



