178 ON THE USE OF 



the sixtli day, Lotli wlien apj)lied above and below the 

 seed. 



4. Sulphuric acid and water below the seed caused the 

 turnip to make its appearance on the sixth day. 



5. Bone-dust below the seed brought up the plant on the 

 seventh day, the same time as it appearecl where no manure 

 was employed. 



In the above instances, with the exception of the fourth, 

 the expense of the manure was the same in each case. 



Genera I Conclusions. 



From the facts and reasons which we have detailed and 

 urged in our ])receding' essay, as well as from information 

 supplied by previous experimenters, we may deduce the fol- 

 lowing conclusions : — 



1. That super j)bosphate of lime is the essential manure 

 for turnips, and })articularly for Swedes. That with it alone 

 a good crop can be raised ; but without it the turnip will 

 not thrive, however rich the manure ma^^ otherwise be. 



2. In preparing the mixture, the bones should be in 

 as fine a state as possible. 



8. That sulphuric acid, from its greater strength and 

 cheapness, is preferable to muriatic acid. 



4. That Avater, in the projjortion of one-half the weight of 

 the acid, should be first sprinkled over the bones. 



5. The proportion ot sulphuric acid most economical to em- 

 ploy should not be less than one-third, nor more than one-half 

 the weight of the bones, and that probably the medium be- 

 tween these two quantities is most advantageous. 



6. That the mixture can be applied either diluted with a 

 considerable qiiantity of water by the aid of a water-cart, or 

 with ashes by means of an ordinary drill. That though the 

 former may be more speedy in its efi:ects, the latter can be 

 more conveniently applied, and has the advantage of admit- 

 ting the addition of a large quantity of ashes. 



7. That vitriol ized bones may be used either alone or 

 with other manures, and that when the latter are at hand, it 

 is more advantageous to use the former in combination with 

 them. For instance, if there are 30 acres to be prepared, 

 and only sufficient dimg to dress 15 acres, it is better to give 

 a half-dressing of dung over the whole of the turnip break, 

 and make up the deficiency by means of sulphated bones. 

 Thus the plant will be forced in its early and supported in 



