SUPERPHOSPHATE OF LIME. 177 



turnips on favourable land can be raised with aslies alone 

 far more easily than Swedes. 



I would therefore recommend in all cases with white 

 turnips; that a less quantity of vitriolized bone be employed, 

 and that g'uano, or some other manure possessing its pro- 

 perties, should be used in combination with it. 



In Ma}' last, a portion of land consisting- of 1-^ acre was 

 drilled with Matson's g-reen top globes, and manured with 

 1 bushel of sulphated bones, 1 cwt. of African gaiano, and 

 about 2o bushels of turf-ashes per acre. The crop was a 

 very good one, exceeding 20 tons to the acre. 



In several instances within my own knowledge where 

 guano has been used with ashes, the crop has been destroyed 

 by the pungency of the manure, probably owing to the 

 ammonia which it contains. There is no danger of this 

 taking place with vitriolized bones, and I have found, though 

 seeds will not vegetate if entirely surrounded with them, 

 they readily will if the manure is mixed with twice its 

 weight of mould. 



The last season has not been a favourable one for dis- 

 playing- the peculiar advantages of vitriolized bones, or 

 rather, it has been from its wetness so favourable for com- 

 mon bones and every other description of manure, that an 

 indiilerent field of turnips has been the exception and not 

 the rule. It is in a dry season when the fly is particularly 

 rife and active, when crop after crop is destroj-ed by this 

 entomological pest, that the advantages of ensuring a vigo- 

 rous growth to young plants is properly appreciated. 

 Amongst all the specifics or antidotes for the fly, there is 

 none, I believe, equal to the employment of vitriolized bones. 

 Hitherto, I have not met with or heard of a single instance in 

 which it has failed to force the plants out of the way of the fly. 

 It is in a dry season, too, that the advantages of early and 

 vigorous growth are shown, when the plant may languish for 

 weeks for want of rain with ordinary manures, and thus 

 lose time that never afterwards can be compensated for. 



In a garden experiment, tried on a small scale to show the 

 effect of different preparations in forcing the young plant 

 out of ground, I found the following results : — 



1. Vitriolized bone applied in solution above the seed 

 caused the plant to appear on the fourth day. 



2. The same applied below the seed brought up the plant 

 on the fifth day. 



3. Vitriolized bones as compost brought up the plant on 



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