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XLIIL On the Cultivation of Celeriac, as practised in 

 Denmark and Germany. In a Letter to William At- 

 kinson, Esq. F. H. S. By Mr. Jens Peter Petersen. 

 Communicated by William Atkinson, Esq. 



Read March 7, 1826. 



Sir, 



According to your request, I send you the following 

 account of the method of cultivating Celeriac, or Knoll-Sel- 

 lerie, in Denmark and Germany. It will be found to differ 

 very much in the details from the directions given, on the 

 authority of Lord Stanhope, in the Third Volume* of 

 the Transactions of the Horticultural Society, for the culti- 

 vation of the same vegetable, as practised in the neighbour- 

 hood of Dresden. 



Celeriac requires a light, moist, and well manured, or rich 

 soil. The ground should be trenched in autumn two spades 

 deep, and mixed with a good dressing of well reduced horse- 

 dung ; it must be dug again in spring, when the plants are 

 ready to be put out. It is essential that the dung should be 

 perfectly decomposed ; if this has not been effected, it is re- 

 quisite that the ground should first be cropped with other 

 vegetables, such as Cabbages, Lettuces, &c, by which the 

 manure will become well united with the soil. 



For summer and autumn crops, sow the seed towards the 

 end of February, very thin, in a moderate hot-bed, in good 

 rich vegetable mould. When the plants appear, they must 

 be inured as much as possible to the open air, to make them 



* See Horticultural Transactions, Vol. iii. page 72. 

 VOL, VI. 3 I 



