6o 



tural College, Cirencester, a full manuring containing 

 nitrate produced more hay than one containing sulphate 

 of ammonia, though the average of all the plots dressed 

 with sulphate was higher than that of the plots receiving 

 nitrate. It may be noticed, in passing, that in the Ciren- 

 cester experiments potash manures seemed to have an 

 unfavourable effect on the action of sulphate of ammonia, 

 but to have assisted that of nitrate of soda. 



Passing on to experiments on land in ordinary farming 

 condition, the evidence is somewhat conflicting. In some 

 experiments carried out in 1894, under the direction of the 

 Durham College of Science, on six farms in Durham and 

 Northumberland, the following weights of hay were 

 obtained : 



TABLE XL. 



No manure 37J cwt. 



Superphosphate and kainite . 43 ,, 



Superphosphate, kainite, and sulphate of ammonia . 45f ,, 



Superphosphate, kainite, and nitrate of soda . . . 46f 



Nitrogenous manures here gave a very small increase 

 when added to minerals ; nitrate being slightly better in 

 this respect than sulphate of ammonia. 



Similar results were obtained on nine farms in Cumber- 

 land, in 1895 ar] d 1896, when the following average weights 

 per acre per annum were obtained : 



TABLE XLI. 



No manure 17f cwt. 



Basic slag, kainite, and sulphate of ammonia ... 25 ,, 

 Basic slag, kainite, and nitrate of soda 25f ,, 



On the other hand, in an experiment carried out on 

 twelve farms in Yorkshire, under the direction of the York- 

 shire College, the following average weights of hay per 

 acre were obtained from the application of the manures 

 mentioned : 



TABLE XLII. 



Manures. 



Alone. 



With 



Sulphate of 

 Ammonia. 



With With 10 tons 

 Nitrate of ; Farmyard 

 Soda. ! Manure. 



Average 



34 



31J 



