180 TALKS ON MANURES. 



This year, the seed and manures were sown in the autumn. And 

 I want the Deacon to look at plot 0. 3 cwt. of Peruvian guano 

 here gives an increase of 10 bushels of wheat, and 1,048 Ibs. of 

 straw per acre. This will pay well, even on the wheat alone. But 

 in addition to this, we may expect, in our ordinary rotation of 

 crops, a far better crop of clover where the guano was used. 



In regard to some of the results this year, Messrs. Lawes and 

 Gilbert have the following concise and interesting remarks : 



"At this third experimental harvest, we have on the continu- 

 ously unmanured plot, namely, No. 3, not quite 18 bushels of 

 dressed corn, as the normal produce of the season ; and by its side 

 we have on plot 106 comprising one-half of the plot 10 of the 

 previous years, and so highly manured by ammoniacal salts in 1845, 

 but now unmanured rather more than 17 bushels. The near 

 approach, again, to identity of result from the two unmanured 

 plots, at once gives confidence in the accuracy of the experiments, 

 and shows us how effectually the preceding crop had, in a practi- 

 cal point of view, reduced the plots, previously so differently cir- 

 cumstanced both as to manure and produce, to something like an 

 uniform standard as regards their grain-producing qualiti s. 



" Plot 2 has, as before, 14 tons of farm-yard manure, and the 

 produce is 2?i bushels, or between 9 and 10 bushels more than 

 without manure of any kind. 



"On plot 10a, which in the previous year gave ly ammoniacal 

 salts alone, a produce equal to that of the farm-yard manure, we 

 have again a similar result: for two cwts. of sulphate of ammonia 

 has now given 1,850 Ibs. of total corn, instead of 1,826 Ibs., which 

 is the produce on plot 2. The straw of the latter, is, however, 

 slightly heavier than that by the ammoniacal salt. 



" Again, plot 5^, which was in the previous season unmanured, 

 was now subdivided: on one-half of it (namely, 5a l ) we have the 

 ashes of wheat-straw alone, by which there is an increase of rather 

 more than one bust 3! per acre of dressed corn ; on the other half 

 (or 5i a ) we have, besides the straw-ashes, two cwts. of sulphate of 

 ammonia put on as a top-dressing : two cwts. of sulphate of am- 

 monia have, in this case, only increased the produce beyond that 

 of 5a' by 71 bushels of corn and 768 Ibs. of straw, instead of by 

 9 3 /4 bushels of corn and 789 Ibs. of straw, which was the increase 

 obtained by the same amount of ammoniacal salt on 10<*, as com- 

 pared with 106. 



" It will be observed, however, that in the former case the am- 

 moniacal salts were top-dressed, but in th? latter they weit drilled 

 at the time of sowing the seed ; and it will be remembered that hi 



