Manuring of Swedes and Potatoes. 



Journal, a dressing of 10 tons of dung with a complete 

 mixture of artificials gave a very profitable return. The 

 best mixture consisted of 4 cwts. superphosphate, 1 cwt. 

 sulphate of potash, and 2 cwts. sulphate of ammonia. It was 

 noted that there was less disease among the potatoes where 

 potash was added to the mixture of artificials. 



Mr. Walker points out that in generalising on the effects 

 of the various manures on the potato crop, he has taken the 

 average of all the centres, but he recommends those who are 

 interested in the subject to study carefully returns from 

 centres situated in their own district, as it is well known 

 that the nature of the various soils and climatic conditions 

 have much to do with the effect of artificial manures. He 

 adds, moreover, that the results have been affected in no 

 small degree by the use of different varieties of potatoes at 

 the several centres, inasmuch as some varieties, e.g. "Up-to- 

 Date/' respond to a greater degree than others, e.g. " Main- 

 crop," to heavy manuring, and future experiments should, 

 in his view, be conducted with special reference to this point. 



