40 



RESULTS WITH WHEAT 



TABLE VII. 



PRODUCE OF WHEAT PER ACRE AT HOLKHAM, 

 AVERAGE OF THREE YEARS, 1852-54 



We have here results of the same character as those 

 obtained at Rothamsted. The ammonia salts with super- 

 phosphate and alkalies give a larger average produce than that 

 obtained from farmyard manure. The good effect of the 

 superphosphate and alkali salts is also plainly manifested, 

 the ammonia salts supplied with these yielding an average 

 of 5 bushels more corn than ammonia alone. The weight of 

 straw in these experiments did not include chaff and cavings, 

 it appears therefore to bear an unusually low proportion to 

 the corn. 



The Rodmersham soil was apparently not unlike that at 

 Rothamsted, for it is described as a mixed clay, resting upon 

 a chalk subsoil 4-6 ft. below the surface. 



The crop preceding the wheat was beans manured with 

 farmyard manure. The land, as at Holkham, was in too high 

 a condition at first to justify the application of a full dose of 

 ammonia, the produce of wheat on the unmanured plot being 

 in the first year 32^ bushels. Omitting this year, the average 

 produce by the various manures in the three succeeding years 

 was as shown in Table VIII. 



