Supei-phosphate and Guano. 
583 
The small produce on Nos. 8 and 9 will not excite surprise when the 
nature of the field on which the experiments took place is known. Till 
the year 1842 it had been for several years an exhausted piece of sainfoin, 
comparatively out of cultivation from its presumed hopeless sterility. 
In March, 1842, it Avas sown with oats, after being well manured. In 
1843 again manured for rape, wheat following in 1344. The crops 
were, as regards straw, very slight ; but the produce of wheat was con- 
siderable, owing to the redundant yield of 1844. The field will be best 
described as a long steep brow facing to the west. The soil is very shal- 
low and spongy, resting on a substratum of the upper chalk. A more 
unfavourable position for the growth of swede turnips cannot well be 
imagined ; and it was merely from local circumstances the spot was 
selected for the experiments. 
[Mr. Drewitt's experiment, which only arrived after the rest of the 
Journal was printed, remarkably confirms the opinion advanced by me in 
an earlier part of this number, that, value for value, Superphosphate of 
lime (for such is the product of bones and sulphuric acid) is on some 
soils superior to guano as a manure for turuips. — Ph. Pusey.] 
F.ND OF VOL. VI. 
