636 



pounds fresh horse manure, and two thirds that amount (667 pounds), 

 each applied on one plat. The three remaining plats received no 

 manure. 



The yields of barley and straw, the increased yields on the fertilized 

 over the unfertilized plats, and the yield of corn on the same i)lats in 

 1889 are given. The differences in yield of barley on the three unfer- 

 tilized plats (8.2, 10.2, and 16.4 bushels per acre) are so much more 

 prominent than any following the application of fertilizers (21.5, 18.3, 

 21.5, and 21.9 bushels), that no reliable conclusions can be drawn, 

 further than that the fertilizers increased the yield of both grain and 

 straw. 



Oais. — Two series of exj)eriments were made with oats. The first 

 was on 17 twentieth-acre plats. Dissolved bone-black at the rate per 

 acre of 140 pounds, sulphate of ammonia 290 pounds, and muriate of 

 potash 85 pounds were each applied singly, two by two, and all three 

 together; and fresh horse manure 1,202 pounds, fresh cattle manure 

 2,000 pounds, gypsum, slacked lime, and salt 30 pounds each, were 

 each applied alone on one plat. Five plats remained unmanured. " The 

 special object of the fertilization of this series is to compare the effects 

 of complete and partial manures. The amount of fertilizer is sufBcient 

 in every case to meet the demands for the particular element or ele- 

 ments supplied of a 50 bushel yield of oats per acre." 



Tabulated results are given showing the yield of corn on the same 

 plats in 1889, yield of oats and straw in 1890, and increased yield over 

 the unfertilized plats. 



The table sliows (1) fairly uniform yields of corn and even greater uniformity in 

 yield of oats on the unfertilized plats ; (2) a greater increase from a complete com- 

 mercial manure than from stable and partial manure; (3) that fertilizer ingredients 

 in pairs generally produced better results then when used singly; (4) that of the 

 substances used singly, salt produced the greatest increase of oats, while bone-black 

 ranked second, and muriate of potash third ; (5) that gypsum and lime were practi- 

 cally without eifect on the yield of grain, while sulphate of ammonia, alone and with 

 boue-black, reduced the grain yield; (6) that the stable manures caused a slight 

 increase and sulphate of ammoaia a marked increase in the proportion of straw; (7) 

 that the complete commercial fertilizer and also bone-black, muriate of potash, gyp- 

 sum, and salt considerably reduced the proportion of the straw. 



The second series of experiments with oats was made on 7 plats, fer- 

 tilized on essentially the same plan as in the above experiment, with 

 barley. Four i)lats received suf&cient amounts of horse manure and 

 "complete" commercial fertilizer, respectively, to furnish a crop of 50 

 and of 33^ bushels of oats per acre. The data given are the same as 

 for the other experiments. 



" It will be observed (1) that the unfertilized plats show a fairly 

 uniform degree of natural fertility ; (2) that all the fertilized plats show 

 fair though not large gains ; (3) that the full application of [commercial] 

 fertilizer produced liitlemore grain and less stiaw than the two thirds 

 application; (4) that the full manuring [with horse manure] produced 



