272 
Report on Experiments conducted in 1886, S^-c. 
Swedes at Sigglesthoene near Hull. 
Ko. of 
Plot. 
Manure per Acre. 
Cost of manure 
per Acre. 
No. of 
Roots on 
each Plot. 
Weight of Roots 
per Acre. 
Increase per Acre 
over Average of 
Unmanured Plots. 
1 
lA 
2 
2a 
3 
10 
11 
12 
12 loads of dung, at 6s. a load 
il2 loads of dung, 3 cwt. of 
superphosphate, 2 cwt. 
Peruvian guano 
(Q loads of dung, 4 cwt. of 
\ superphosphate j 
(6 loads of duug, 4 cwt. ofl 
\ dissolved bones J 
1 4 cwt. of superphosphate,! 
\ IJ cwt. of nitrate of soda / 
(4 cwt. of superphosphate, IJ 
< cwt. of nitrate of soda, 2 
( cwt. of sulphate of potash 
Nothing 
4 cwt. of coprolites 
Nothing 
4 cwt. of superphosphate 
(4 cwt. of superphosphate, 1| 
( cwt. of sulphate of am- 
( monia 
4 cwt. of superphosphate, IJ 
J cwt. sulphate of ammonia, 
I 2 cwt. sulphate of potash .. 
(4 cwt. superphosphate, 2 cwt. "I 
I sulphate of potash . . . . / 
IG loads of dung, 4 cwt. super-) 
phosphate, IJ cwt. nitrate) 
( of soda ) 
£ s. d. 
3 12 0 
4 17 9 
2 11 0 
3 0 0 
1 10 0 
2 2 0 
0 14' 0 
0 15' 0 
1 10 0 
2 2 0 
17 0 
3 6 0 
3713 
3545 
3855 
3471 
3753 
3693 
3804 
3672 
3325 
4102 
4167 
3995 
3812 
3988 
tons cwt. qrs. lbs. 
9 0 3 0 
12 0 3 2 
10 16 0 0 
10 16 0 14 
10 10 0 0 
11 8 0 0 
14 1 0 
10 0 0 
6 0 0 
9 2 0 
10 1 0 0 
8 14 0 0 
7 10 0 0 
12 10 1 0 
tons cwt. qrs. Ihs. 
6 2 3 14 
9 3 1 14 
7 
7 
7 
3 
5 
7 
5 13 3 14 
4 9 3 14 
9 10 0 14 
These experiments are probably the most valuable of the 
series, from the fact that the land was in the poorest condition 
manurially, and hence the action of the different dressings is 
more apparent. The mechanical condition, owing to the much 
stifTer nature of the land, and the great difficulties of preparing 
a tilth, in consequence of a wet and very backward spring, 
accounts for the irregularity of the plants, and the smaller 
number of roots on each plot. 
Superphosphate for the third time in these Yorkshire experi- 
ments has proved itself superior to ground coprolites, and so 
far as that part of the country is concerned, there can be left 
but little doubt on the question of dissolved versus undissolved 
phosphates. Either nitrate of soda or sulphate of ammonia 
have given with superphosphate a rather more economical 
return than the latter mixed with six loads of dung. Dung, used 
alone, has not had a high result, and the use of artificial manures 
with a small quantity of dung would appear to have been, on 
land in such condition as this, the most profitable manuring to 
