264 Reioort on Experiments conducted tVt 1887 hy 
land was dunged througliout for the mangolds. The general 
results, in a season which was a dry one, were that dung 
(12 tons per acre) could best be supplemented by the addition 
of nitrate of soda, which latter could be advantageously used 
even to the extent of 2 cwt. per acre, and that top-dressing 
after singling was the best mode of application ; that super- 
phosphate added to the dung gave no increase, though the' 
experiment left it undecided whether superphosphate added to 
nitrogenous top-dressings increased the yield ; that sulphate of 
ammonia did not give such good results as nitrate of soda ; but 
that to sow it with the seed was better than top-dressing. In 
1887, on the same land, oats were grown, with the object of 
seeing what effect, if any, the manures used for the mangolds 
would have on the subsequent oat crop, no fresh manure 
being therefore added. In the Table on page 263 are given 
the results both of the mangold crop of 1886, and the oat crop 
of 1887. 
As a general result, the manure which gave the heaviest 
mangold crop also yielded the heaviest oat crop, 4| bushels of . 
oats and 3 cwt. of straw more than from dung alone being the 
highest increase. Such a result, as Mr. Dyer rightly remarks, 
is probably due not so much to any actual residues of nitrate of 
soda, sulphate of ammonia, &c., applied, but to the store of food 
left in the soil by the rootlets of the mangold crop. The benefit 
from superphosphate was very slight, whilst there was none from 
potash manui-es or salt. The influence of dung over no manure 
was very distinct; 13 bushels of corn and 9 cwt. of straw, as 
well as 8 tons of mangolds in the previous year, having been the 
additional produce. This supplies interesting evidence of the 
efiiciency of dung for a second season. 
B. — Experiments on Mangolds. 
Mr. Rosling having found in 1886 a high manuring to be so 
successful, wished to extend it still further. Whether he would 
in an ordinary season have been successful cannot be told ; at 
any rate, in the present case the important factor of the weather 
upset all calculations, and deferred to a future year the full 
solution of these interesting problems. The scheme of 1886 was 
extended in the direction in which it had been found most 
profitable — viz., the use of nitrate of soda — and was further 
supplemented by the addition of plots in which guano and basic 
cinder were used. The field selected was one somewhat similar 
to that used the year before, but the subsoil, instead of being 
gravel, was white clay containing chalk nodules. It was richer 
in lime, potash, and phosphoric acid, and was altogether decidedly 
fl rich soil. The analysis of it was as follows ; — 
