54 FERTILISERS AS AN AID TO 



improved the quality. The most valuable crop 

 is obtained by using a light dressing of dung 

 with suitable artificials. 



" The susceptibility to disease is greatest 

 in the plots with large dressings of dung, that 

 with fresh dung being more than with rotted. " 



In Yorkshire, where potatoes are also grown 

 very extensively, the Agricultural Department 

 of the University of Leeds have 

 caused trials to be made during four 

 years at numerous centres in the county, where, 

 again, the best returns are from 10 tons farm- 

 yard manure and a similar complete manure 

 to that already described was used, the 

 average maximum crop being 9 tons, 10 cwts., 

 2 qrs., a gain over the unmanured of 4 tons, 

 6 cwts. of potatoes per acre, and an average 

 profit, after paying for the manures, of 5. 8s. 

 per acre. 



Similar results to the foregoing can be quoted 



from all over the country, but it seems hardly 



necessary to do more than mention 



Lincolnshire, ^^ j n Lincolnshire, experiments 



Scotland? have been conducted . b Y the Midland 

 Midlands. Agricultural and Dairy College ; in 

 Shropshire, by the Harper-Adams 

 Agricultural College ; in the large potato-growing 

 districts of the East of Scotland, by the Edin- 

 burgh and East of Scotland Agricultural Col- 

 lege ; in Suffolk and Hertfordshire ; in Devon- 

 shire, Bedfordshire, &c. Complete manures 

 were employed in addition to farm-yard manure, 

 and all of the experiments confirm the trials 



