PRACTICAL INFERENCES. 273 



** Hence, the proper remedy in such a case would seem 

 to be, that of applying some other manure, which may fur^ 

 nish a due supply of the deficient matters. 



'* Thus, if the nitrates have failed, we should be inclined 

 to try the next year the effect of phosphate of lime, or of 

 animal manure, upon the same soil. 



*' But it seems to happen sometimes, that the same land, 

 which is benefited by the administration of one kind of nitric 

 salt, is scarcely affected by another. 



*'This anomaly presented itself in an experiment on a 

 small scale, which was tried at my request, by my broth- 

 er, the Rev. E. Daubeny, on his farm, in the vicinity of 

 Cirencester. 



"The subsoil is a stiff retentive clay, resting upon the 

 cornbrash limestone, and the farm, before it came into its 

 present occupation, was in an exhausted condition, though 

 it has latterly yielded somewhat better returns. 



'* A coarse analysis of a sample, conducted according to 

 the method recommended by Mr. Rham, in the Journal of 

 the English Agricultural Society,* afforded me the follow- 

 ing results : 



" 1000 grains contained, 607, of impalpable powder, consisting of 

 Water . . . . .57 



Humas . . . . .57 



**Four equal strips of this land, each somewhat ex- 

 ceeding J of an acre, and contiguous one to the other, 

 which had been sown with wheat in the autumn of 1839, 

 were measured out. 



'*The first of these, which lay next to the hedge, was 

 left without any addition of manure. 



*'The second, adjoining, had a top-dressing of J cwt. of 

 nitrate of potass given it in April. 



"* Number 1, page 46." 



