136 
Basic Cinder as Manure. 
the nitrate on July 25 ; and the crop was weighed on November 18. Plot No. 8 
in this series unaccountably gave very high results, wbich are excluded from 
further consideration. Both in these experiments and in Mr. Ilaygarth's, 
which were only distant about two miles, the phosphates gave lower results 
than are usual in this district on land in ordinary or rather poor condition. 
Iii all these five cases tlie unmanured plot gave the lowest 
results. Iii all cases but the Royal Agricultural College, the 
plot with farmyard manure and superphosphate gave the highest 
yield of roots. At the Royal Agricultural College, nitrate of 
soda this season had a particularly good effect, aud nitrate and 
superphosphate gave the highest result. In both Mr. Burnett's 
and Mr. Haygarth's experiments nitrate and superphosphate 
gave the second-best results. In Mr. Edwards's, farmyard 
manure 4 cwt., and slag, gave the second-best results ; in Mr. 
Silvester's, farmyard manure alone. With Mr. Burnett and 
Mr. Silvester, although slag alone has proved a good manure, 
yet mixed with farmyard manure it seems to have had an ill 
effect on the yield. The reason of this is not obvious, but may 
have something to do with the presence of ferrous compounds. 
In the majority of cases, C cwt. of slag have given worse, or no 
better, results than 4 cwt. The slag alone has in nearly every 
instance given a good increase, in some cases equal to the super-: 
phosphate, but it appears to be more uncertain in its action than 
the latter, especially when mixed with farmyard manure or 
with nitrate. It seems, from these results, that it is not usually 
desirable to apply more than 4 cwt. of slag per acre for roots, and 
it is quite probable that, had the slag been applied earlier, before 
Average increase of 
farmyard manure 
series over non- 
nitrogen series . . . 
Average increase ofj 
nitrate series over [ 
non-nitrogen series) 
Increase from 4 cwt.] 
of slag alone over r 
unmanured . . . ) 
Increase from G cwt.l 
of slag alone over | 
unmanured . . .J 
Increase from super- ) 
phosphate alone > 
over unmanured . J 
Tons of Itoots per Acre 
(1) 
Mr. Burnett 
(3) 
Mr. Edwards 
(4) 
Mr. Hay- 
garth 
(8) 
Mr. Silvester 
(10) 
Royal 
Agricultural 
College 
3i 
4 
4f 
n 
2 
3 
4 nearly 
5i nearly 
1 
i 
3 
n 
11- 
o nearly 
3J 
9 
1 nearly 
5 
2 nearly 
