i6g 



THE MANURING OF POTATOES. 

 Useful observations on the manuring of potatoes are 

 contained in the reports recently issued by several agri- 

 cultural colleges in Great Britain relating to the results 

 obtained in experiments, conducted on more or less 

 similar lines, to determine the effects on the crop of the 

 application of varying quantities of artificial manures, when 

 used alone and in combination with dung, and to test the 

 respective merits of the different artificial manures 

 employed. 



Experiments of this character were carried out, in 1898, in a 

 field at the Manor Farm, Garforth, by the Agricultural 

 Department of the Yorkshire College ; at Cockle Park, North- 

 umberland, under the direction of Dr. Somerville ; on 19 

 farms in Scotland under the supervision of Professor Wright 

 of the Glasgow and West of Scotland Technical College ; 

 and at ten stations in Lancashire, under the direction of Pro- 

 fessor Campbell, on behalf of the Harris Institute, Preston. 

 The detailed schemes of the trials at these four centres were 

 directed, inter alia, to the elucidation of the following points, 

 viz.: the influence on the potato crop of supplementing dung' 

 with artificial manures ; the effects of using artificials alone 

 and in combination with dung ; the effects of the omission of 

 nitrogen, phosphoric acid, and potash respectively from a 

 complete manure containing all three ; the effects of 

 increasing nitrogen, phosphoric acid and potash respec- 

 tively in a complete manure ; and the relative values of 

 sulphate of ammonia and nitrate of soda. 



Some features of practical interest are afforded by the 

 results of the comparative trials made with dressings of dung 



