Experiments upon Swedes. yi 
Pbt 9. jfaiiured with 1 cwt. of Sulphate of Ammonia. 
tons. cwts. ([rs. lbs. 
T'roducc 15 17 8 12 
Increase 1 3 2 8 
riot 12. Manured with 2 cwts. of Sulphate of Ammonia. 
tons. cwts. qvs. lbs. 
Produce IG 17 3 12 
lucreasc 2 3 2 8 
Tho .sulphate of ammonia used in these experiments was 
louncl to consist, in 100 ])ai ts, ot — 
Pure sulphate of ammonia 98"28 
Fixed salts '78 
Moisture "94 
100-00 
The increase on Plot 9, obtained with 1 cwt. of sulphate of 
ammonia, is inconsiderable, and might be ascribed to natural 
variations in the soil, or to the ashes with which the sulphate 
was mixed. But the larger increase, produced by double the 
quantity used on Plot 12, together with the fact that Peruvian 
guano produced a much better result than in former experiments, 
shows that sulphate of ammonia has had a beneficial effect on 
the swedes in this instance. The effect, however, was not great 
when compared with that produced by phosphatic manures. 
Plot 11. Jfanured icith 3 cwts. of fine Bone-dust. 
tons. cwts. qrs. lbs. 
Produce 18 9 2 IG 
lucreasc 3 15 1 12 
Bone-dust, as might have been anticipated, gave a considerable 
increase. The bone-dust used in this experiment was very 
fine, it having been specially reduced to a coarse meal. On 
analysis it was found to consist of — 
Moisture 10-58 
*Organic matter 30-61 
Phosphates 51-67 
Carbonate of lime and magnesia .. .. 6-03 
Alkaline salts .. .. 0*58 
Sand 0-53 
100-00 
* Containing nitrogen _ 3-71 
Equal to ammonia 4-50 
Plot 13. Manured loith 3 cwts. of Turnip-manure. 
tons, cwts, qrs. lbs. 
Produce 20 1 1 20 ' 
Increase 5 7 0 16 
VOL. XXII. G 
