v] 



INCREASING THE BULK 



55 



Yield of hay, cwts per acre 

 Live weight gains in sheep, 



Ibs per week 



Average annual gain or loss 



over unmanured... 

 Average annual gain or loss 



over unmanured when 



quality is taken into 



account 



-Us. Id. 9s. 3d. 19s. lid. -8s. 5(7. 

 * Loss of 5s. 6d. 



23s. 



When the complete manure is used it is safe to increase the 

 dressing of nitrate of soda or sulphate of ammonia, and as a general 

 rule the more nitrogenous manure is used the bigger the crop. 

 Whether the increase is profitable depends of course on prices. 

 There is some deterioration in quality : the tall growing grasses 

 flourish so much that they crowd out the weeds. Thus, at 

 Rothamsted the results were: 



Similar results were obtained in the Yorkshire experiments 1 : 



Manurial dressings per acre 

 Unmanured ... 

 2 cwts superphosphate, 3 cwts kainit, and no nitrate of soda 



> 5 1 CWt ,, 



lcwts 



> J " - It ** 



Average yield 



of hay, 

 1899 and 1900 

 cwts per acre 



21-5 



25-5 



32-5 



35-0 



37-8 



1 Leeds Dept. of Agric. Rep. for 1900, No. 14, Table VI. 



