- 867 



The analyses Avliicli were made of 1 2 " special " potato manures, taken 

 in couuectiou with tlie results of these trials, lead the author to sug- 

 gest that potash " should be relatively more abundant in fertilizers 

 especially devsigned for this crop than is usually the case. The 12 spe- 

 cial potato fertilizers contained on the average, nitrogen 3.4, phosphoric 

 acid 10.69, and potash 6.30 per cent." 



Experiments with oats (pp. 76-82). — Two of these were made, one 

 being on the college farm. In both cases nitrate of soda proved espe- 

 cially beneficial to the crop. '' It proves more useful than eitlier phos- 

 phori(5 acid or potash, and gives less increase wheu used either with 

 muriate of ijotasli alone or with muriate of potash and ])hosphori(? acid. 

 Our experiments with oats, tlieii, although limited in numbei-, strongly 

 indicate the advisability of applying a small quantity of nitrate of soda 

 for this crop." 



Experiments ivith earn (pp. 82-87). — In the two experinuMits with 

 corn, nitrate of soda proved decidedly beneticial, in one case more so 

 than any other material; in tlie other, potash seemed to be the element 

 juost ueeded, and this result bore out the conclusions of the 2 previ- 

 ous years. 



The use of muriate of potash with manure for corn, 

 W. P. Brooks, B. S. (pp. 87-89).— One acre of land was divided into 

 4 equal plats. Plats 1 and 3 received 6 cords of barnyard manure 

 ]K'r acre, and plats 2 and 4, 3 cords of barnyard uuinure and 124 

 l)ounds of muriate of potash per acre. The yields of corn were as 

 follows: 



Yields of corn per acre. 



riat. 



Manure per acre. 



Yield per acre. 



Shelled 

 corn. 



Stover. 



No.l... 

 No. 2... 

 No.3... 

 No. 4... 



6 cords barnyard niauure 



3 cords barnyard manure, 124 pounds muriate of potash 



6 cords barnyard manure ^ 



3 cords barnyard manure, 124 pounds muriate of potash 



Bushels. 

 61.1 

 57.2 

 61.5 

 55.4 



Pounds. 

 3,840 

 3,780 

 3, 800 

 3,600 



'^ These figures and comparisons show that the manure alone pro- 

 duced slightly the better crop, but estimating manure at $5 per cord 

 and muriate of potash at $45 per ton, shelled corn at 65 cents per 

 bushel and stover at $5 per ton, we find that the manure and potash, 

 although producing a slightly less valuable crop, gave a financial 

 result nearly $9 better than manure alone." 



A comparison of the fertilizing ingredients applied in tlie manures 

 and removed by the crops indicates that "the unexhausted manurial 

 residue in the soil of plats 1 and 3 is worth more than in the soil of plats 

 2 and 4. It is proposed to continue this acre in a similar experiment for 

 '(X series of years," 



