By Edward Solly, Esq. 



The mean of each five weighings, alone is given ; the numbers 

 shew the weight of water retained by each portion during the 

 experiment. 















2d Do* . ' . 

 3d Do. 



5th Do! ' . 

 6th Do. 



8th Do'. . ' . 







^408 

 273 







9th Do. 

 10th Do. 

 11th Do. 

 12th Do. 

 13th Do. 



15th Do.' ' . 

 16th Do. 



13 





57 



25 



71 



jj 





In the experiment on Mangel Wurzel, it is remarkable that 

 no effect appeared to be produced by the Sulphate of Ammonia, 

 or by the Super-phosphate of Lime ; two manures which had been 

 expected to produce the most marked effects. When the manures 

 were applied, it was observed that the squares Nos. 12 and 14, 

 looked rather poorer than the others ; the young plants were smaller, 

 and less flourishing ; it was for this reason that the two manures 

 supposed to be the most powerful were applied to them, but the 

 plants did not improve, and remained inferior in size and appear- 

 ance to the last. It is proper to state this, or otherwise the expe- 

 riment might appear unfavourable to the use of those manures, 

 which would certainly be an incorrect conclusion.* 



* The value of these substances, as manures, is every day becoming more evident. 

 The Superphosphate of Lime in particular, is producing excellent effects. At the time 

 when the above-described experiments on Mangel Wurzel were made at the Gardens, 

 my friend, Mr. H. Aglionby, M.P. made others with green round Turnips, on very poor 

 soil, on which the superphosphate produced a larger crop than any other manure. 

 In these experiments, Sulphate of Ammonia, drilled in under the seed, failed entirely ; 

 on very chalky soil the whole crop was destroyed, and on clayey soil it was evidently 

 greatly injured, though not to the same extent as on chalk. This salt appears to be 

 decidedly best as a top dressing, either mixed with mould or road drift. 



