Combination of Manures. 
445 
the 4 cwts. of salt, or 6Z. 4s. 6(7. the acre. The next highest gain is 
from the application of 4 cwts. of blood and bone manure and 4 cwts. 
of salt ; in both cases the advantage of applying salt in conjunction 
with either guano or artificial manures was clearly shown. Similar 
results have attended the experiments made by Mr. Keary ; and the 
practice of mixing farmyard dung with artificial manures is generally 
adopted in Sufifolk as the safest and best mode of applying those 
manures, which yield a great increase of produce when applied in 
conjimction, but not so when used separately. 
The Discussion. 
In the discussion which ensued the following topics came under 
consideration : — 
1. The advantage of applying the manure in autumn, or to the 
previous crop. 
2. That of using a combination of manures. 
3. The possibility of growing mangold for several years consecu- 
tively on the same ground. 
4. The benefit derived from salt. 
5. The best width between the drills. 
Autumn Application of Manure. 
Mr. Holland remarked on the smallness of the crop grown, which, 
being ignorant of the nature of the climate and soil, he was disposed 
to attribute to the farmyard manure having been put in at the same 
time as the seed. If it had been mixed with the soil in the autumn, 
it would have been out of the way both of the seed and the root. He 
considered that a great quantity of mangold is destroyed in shape and 
in value from the bulbs being in contact with the long straw, &c., of 
farmyard dung. After the seed-bed has been got into nice order in 
the autumn, so as to require little further cultivation, the trampling 
nnd pressure caused by laying on manure in spring does it considerable 
harm. The bringing up of fresh soil at this time is also imdesirable. 
These remarks, however, would only apply to mangolds grown on 
heavy soil. The soil with which he was acquainted was so stiff that 
the only way to fit it for a root-crop was by burning, so as to effect at 
once a mechanical and a chemical change in its properties ; though 
much vegetable matter would be burnt, the phosphates and salts re- 
maining in the ashes would act the more effectually upon the crop. 
The Combination of Manures. 
Mr. Holland further called attention to some remarks of Mr. Pusey 
on the advantage of combining manures. Mr. Pusey writes : — • 
" The inference arrived at (from the experiments) is, that it is more pro- 
fitable to use some artificial manures in conjunction with dung than to use 
«ither singly. Thus, guano and woollen rags used singly added to my crop 
only 5 tons per acre ; the single dressing of dung added only 11 tons, and 
doubling that amoiint of dung did no good. But guano combined with the 
same amount of dimg, and rags combined with the same amount of dung, 
each gave an addition, not of 16 tons of roots, according to their effects when 
