MANURING POTATOES.

King Country Chronicle, Volume VI, Issue 429, 10 January 1912, Page 3

MANURING POTATOES.

A series of experiments carried out under the Univeristy College of North Wales by the County Council of Anglesey, Carnarvon, Denbigh, and Flintshire are interesting as showing the benefit to be derived from a fairly full dressing of manure. Professor Winter (says an exchange) had charge of these experiments, and, judigng by the summarised results, in the matter of profit there is little to choose between the following two mixtures: (1) 10 tons farmyard manure, 2021bs sulphate of ammonia, 524 superphosphate, and 1641ba sulphate of potash; (2) 10 tons farmyard manure, 101 lbs sulphate of ammonia, 2621bs superphosphate, S2lbs sulphate potash. The former gave a heavier yield, produc ing about 12cwt of marketable potatoes more than the latter, the relative cost of each was £2 32s as against £1 6s, which was the price of the artificial manure, alone. Without farmyard manure a ton less of marketable potatoes to the acre was grown. The heavier dressing, nwmely, 20 tons of farmyard manure to the acre, produced about 2cwt of potatoes more than the smaller dressing of 10 tons: The effect of adding potash to the manurial mixture was to make an increase of Bcwt9 91bs, and to add nitrogen, 10 cwt 851bs, while the addition of the phosphate brought the increase to lOcwt 731bs. Contrasted with a plot to which no manure was applied, the use of the full dressing of artificials alone brought an increase of 4 tons lcwt 381bs of potatoes per acre, and. as the cost of this application was 52, it was ouviously very profitable.