Experiments with different Top-dressings upon Wheat. 9 



Composition of Wheat Manure. 



Moisture 13-60 



*Sulphate of ammonia 10*97 



. r Soluble nitrogenized organic matter 



' I Insoluble nitrogenized organic matter .. 



Bi-phosphate of lime 



Equal to bone-earth rendered soluble by acici 



Insoluble phosphate of lime (bone-earth) 



Sulphate of magnesia 



Hydrated sulphate of lime 



Chloride of sodium (common salt) .. 



Insoluble siliceous matter (sand) .. 



8-08 

 14-72 



3-54 

 (5-52) 



9-45 



61 



19-73 



16-84 



2-46 



100-00 



*Containing nitrogen 2 '32 



Equal to ammonia 2-82 



fContaining nitrogen 3*53 



Equal to ammonia , 4*28 



Total quantity of nitrogen 5*85 



Equal to ammonia -. .. . . 7*10 



PLOT V. Top-dressed, March 22nd, with Proctor's wheat- 

 manure, at the rate of 6 cwts. per acre, cost 2/. 8s. per 

 acre. 



During the first three or four weeks there was no difference 

 perceptible in Plots IV. and V., but in the beginning of June it 

 became plain to a careful observer that the wheat on this plot 

 was evidently all the better for the extra dose of manure. 



The wheat continued to improve, and took the lead of the 

 experimental plots. At harvest time the wheat on this plot was 

 perceptibly higher in straw than on any of the other plots, and 

 the ears of corn likewise appeared rather longer and better filled 

 than on any of the other portions of the experimental field. The 

 reapers, without exception, pronounced the crop on Plot V. the 

 heaviest of all ; and the correctness of their opinion, it will be 

 shown, was fully borne out by the direct weighings of the yield. 

 The contrast in the appearance of this plot and the rest of the 

 general wheat-crop was most striking. Although the wheat on 

 No. V. was high, it stood perfectly erect at harvest, and pro- 

 duced strong healthy straw. 



PLOT VI. Left unmanured. 



The wheat on this plot was fully three inches lower than on 

 the preceding plot. Although it was not so dark green as the 

 crop on Plots I., II., III., IV., V., it was, nevertheless, healthy- 

 looking, but rather thin. 



PLOT VII. Top-dressed with chalk-marl, at the rate of about 

 4 tons per acre. 



There was not the slightest difference perceptible in this and 



