146 Summary of Agricultural Experiments, [may, 



per ton, and deducting the cost of the artificial manures, the most 

 profitable dressing, however, was 3 cwt. of salt alone (Plot 5). This 

 produced an increase over the plot receiving dung alone of 4 tons 

 6 cwt., and, owing to its small cost, a profit due to the salt of 295. 6d. 

 per acre. The dressing of nitrate of soda, superphosphate, and salt 

 (Plot 8) gave an estimated profit of 265. 3d. per acre ; 2 cwt. nitrate of 

 soda and 3 cwt. salt (Plot 9) gave 245. per acre, and the nitrate of soda, 

 superphosphate, and kainit (Plot 7) gave 18s. per acre. 



The experience gained from these experiments suggests that the 

 application of artificial manures to mangolds in addition to a good 

 dressing of dung is profitable, and in view of the better quality of the 

 roots on Plots 7 and 8, together with the fact that a more even plant 

 was obtained, the use of either of the mixtures applied to these plots is 

 recommended. Artificials appear to assist in giving the crop a start, 

 particularly in an unfavourable season, and as it is a matter of the 

 greatest importance to secure a regular plant, the use of artificial dress- 

 ings in some form or other can for this reason be recommended. 



Manuring of Mangolds (Univ. Coll. of N. Wales, Bangor, Bull. 4, 

 1909). — This experiment was carried out at six centres in 1909. The 

 season was not a normal one so far as mangolds were concerned, and 

 practically no crop was produced on the unmanured plot at three of the 

 centres. The average crop on the unmanured plots at all centres was 

 10 tons 9 cwt. Ten tons farmyard manure per acre increased this to 

 22 tons 17 cwt., and 20 tons farmyard manure gave 27 tons 10 cwt. 

 If the manure is valued at 55. per ton, the 4 tons 13 cwt. of mangolds 

 produced by the additional 10 tons of farmyard manure cost 11s. per ton, 

 at which rate the manure could have been more profitably used else- 

 where. A dressing of 128 lb. nitrate of soda, 349 lb. superphosphate, 

 and 82 lb. sulphate of potash, costing £1 Ss. gd., when applied with 

 10 tons of farmyard manure, gave an increase in crop of 4 tons 6 cwt., 

 but the same dressing, used in conjunction with 20 tons of farmyard 

 manure, gave an increase of only 1 ton 7 cwt. above the manure alone. 



Manuring of Mangolds (Hereford C.C., Rept. on Field Trials on 

 the Manuring of Mangolds in 1909). — Trials were conducted at seven 

 centres. A dressing of farmyard manure was given to all the plots, 

 with the exception of one centre, where only the artificials were used. 

 On the plots to which no artificials were applied the average crop was 

 26 tons 17 cwt. The most profitable dressing was 1 cwt. sulphate of 

 ammonia, 1 cwt. nitrate of soda, 4 cwt. superphosphate, f cwt. sulphate 

 of potash, and 3 cwt. salt. This cost £2 js. 6d. per acre, and resulted 

 in an average increase in the crop of 11 tons 14 cwt., which, valued 

 at 10s. per ton, would give a profit due to the manures of ^3 gs. 6d. 

 Three cwt. of salt added to the general dressing of artificials gave a 

 good profit, and when salt was used sulphate of potash gave better 

 results than muriate of potash. Four cwt. superphosphate per acre was 

 compared with an equal money value of steamed bone, dissolved bone, 

 and basic slag, and always proved superior. 



Manuring of Mangolds (Rothamsted Expt. Station, Ann. Rept. for 

 1909). — The results are given of the mangold crop on Barn field with 

 different systems of manuring. 



Manuring of Turnips (Aberdeen and N. of Scotland Coll. of Agric, 

 Leaflet 7).- — These experiments were carried out at fourteen centres in 



