270 
Report of Experiments conducted in 1886 
allow the application of further manures to tell. The produce 
from the unmanured plots was high — 12 loads of dung per acre 
added 14 cwt. only to the crop : 4 cwt. superphosphate, used 
alone, gave an increase of 2 tons 3 cwt. per acre, and the largest 
yield was obtained by the use of superphosphate with 6 loads of 
dung. Ground coprolites involved actual loss, and it is evident 
that on such land in Yorkshire, superphosphate is evidently 
the manure to use. The addition of potash manures has caused 
no benefit, and they were evidently not required. Sulphate of 
ammonia did better than nitrate of soda here. 
The results are given on page 269. 
(5.) Experiments on Swedes at Hampole after Barley, 
The soil of the experimental field consists principally of a 
deep and rather strong loam on a clay subsoil, except at the 
upper side next the road, where the Magnesian Limestone 
forms the subsoil, and the soil is rather lighter and thinner in 
character. The land varies considerably, a weak patch cross- 
ing most of the plots ; this is a difficulty which is experienced 
generally in carrying out experiments, and one reason why 
repetition is so desirable. The results are given on page 271. 
The duplicate unmanured plots were very fairly alike, and 
the influence of the different manures told considerably. Most 
striking is the superiority shown by superphosphate over 
ground coprolites, as was also the case at Gardham. At Hampole, 
however, dissolved bones used with dung have shown rather 
better results than superphosphate. Also, sulphate of potash 
used with either nitrate of soda or sulphate of ammonia has 
on this less rich soil shown to advantage, the best result on the 
whole being derived from a combination of artificial manures 
including superphosphate, nitrate of soda, and potash in some 
form. It would be interesting to experiment and see in what 
form and in what quantity potash is best applied on such lahd. 
Artificial manures have shown most favourable results as com- 
pared with dung, though it must be borne in mind that the 
more durable nature of the latter has also to be considered. 
(c.) Experiments on Swedes at Sigglesthokne, Hull. 
The soil is a strong loam, resting on a clay subsoil, and there 
was difficulty in getting a proper tilth. The field has been in 
a very exhausted state, beans and oats without manure having 
•been grown. 
The results are given on page 272. 
