524 Agricultural Chemistry— Turnips, 



manures, as lias already been stated, were this year sown alone 

 before the seed, yet the detailed results given in division 4 of the 

 Table still afford instances of the injurious effect arising from the 

 proximity to the plant of certain manures, though in so slight a 

 degree as to be almost immaterial. 



Summary.* 







Number 





Description of Manures. 



of Plants 





per Acre. 



Mean of mineral 





23,882 







22,596 



» 





23,598 



J) 



„ with both rape-cake and ammoniacal salt . 



22,954 



The influence of climatic condition, not only as of itself a source 

 of constituents, but as rendering available the supplies provided 

 by the farmer, is strikingly illustrated by the details next quoted : 

 wherein it is seen that notwithstanding the comparatively large 

 number of plants in 1 845, which might be supposed to prevent 

 individual development, there is a marked increase as compared 

 with 1844. 



Description of Manures. 



Number of Plants 

 per Acre. 



Averasre weight 

 of Bulbs. 



1844. 



1845. 



1844. 



1845. 







20,095 



23,731 



M9 



1-61 



Mean of purely mineral manures 



• • 0 



20,377 



23,882 



0-73 



1-16 



It is here seen that, even with so great a number of plants, the 

 average weight of bulb is very considerably higher in 1845 than 

 in 1844. In the case of the dung the supply by manure is not 

 supposed to be better than in 1844. In the case of the mineral 

 manures, however, the quantities were larger than before ; but 

 the accumulation of organic constituents must have been almost 

 entirely from atmospheric resources. A comparison of the 

 results of the one year with those of the other, as given above, 

 sufficiently prove then the essential influence of climatic agency 

 for the development of the turnip-bulb in full agricultural 

 quantity ; but the great defect in formation of bulb within a given 



* It will be remembered that in former years the plants were set out with the view 

 of retaining abuut four to a square yard, or 19,360 upon an acre ; the design in this 

 third year was to increase the number to about five instead of four, which is equal to 

 24,200 to the acre, and hence the actual numbers in the table just given are much 

 higher than hitherto. 



