44 



REPORT 1859. 



or by the top-dressing with wheat-manure an increase of 12^ bushels; and by 

 that of guano an increase of 13 bushels of corn was obtained at an expense 

 oft 12*. 6d. 



5. The larger supply of a mixed mineral and ammoniacal fertilizer gave 

 an increase of 1 7 bushels of corn and 9 cwt. of straw over the yield of the 

 undressed plot. 



It will thus appear 



1. That nitrates applied by themselves materially increase the yield of 

 both straw and corn. 



2. That the admixture of salt to nitrate of soda is beneficial. 



3. That ammonia and nitrogenized matters, which proved ineffective or 

 even injurious in relation to turnips grown on a similar soil on which the 

 wheat was grown, had a most marked and decidedly beneficial effect upon 

 the wheat-crop. 



In conclusion, I would observe that I purpose to record the effect of the 

 top-dressings used in the preceding experiments upon the succeeding crops. 



