1020 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



satisfactory results than did the plots on which the chemical fertilisers 

 followed an application of dung to the previous crop. The same observa- 

 tion was made in later years, when the quantity of nitrate of soda applied 

 to the undunged plots was increased to 8 cwt. per acre. 



The average results obtained during 1900 and 1901 are given in the 

 following table : — 



WINTER LETTUCES, 1900 and 1901. 



Annual manuring per acre 



Annual cost 

 of manure 

 per acre 



Total average 

 weight of 

 Lettuces 

 per acre 



Average weight 

 per Lettuce 





£ 



s. 



d. 



tons 



cwt. 



oz. 



50 loads (25 tons) London Dung (applied to 















25 loads (12^ tons) London Dung (applied to 





nil 





13 



17 



19-7 















previous crop) 





nil 





11 



15 



16-7 



25 loads Dung (to previous crop) ; Lettuces 















dressed with Phosphates (no Potash) and 















2 cwt. Nitrate of Soda .... 



1 



15 



0 



15 



1 



21-4 



Ditto, ditto (with Potash) .... 



2 



5 



0 



14 



3 



21-8 



25 loads Dung (to previous crop) ; Lettuces 















dressed with Phosphates (no Potash) and 















4 cwt. Nitrate of Soda .... 



2 



15 



0 



14 



12 



20-7 



Ditto, ditto (with Potash) . 



3 



5 



0 



14 



12 



207 



25 loads Dung (to previous crop) ; Lettuces 















dressed with Phosphates (no Potash) and 















6 cwt. Nitrate of Soda .... 



3 



15 



0 



15 



0 



21-4 



Ditto, ditto (with Potash) .... 



4 



5 



0 



15 



7 



21-7 



No Dung to previous crop ; Lettuces dressed 















with Phosphates (no Potash) and 













15-9 



8 cwt. Nitrate of Soda .... 



4 



15 



0 



11 



3 



Ditto, ditto (with Potash) .... 



5 



5 



0 



12 



3 



175 



Globe (or Thistle-headed) Artichokes. 



We have recorded five crops, from the same plantation, of Globe (or 

 Thistle-headed) Artichokes— the edible heads or buds of which must not 

 be confounded with the tuberous roots of the Jerusalem Artichokes. 



The result was to show a very large increase in the number of "heads" 

 cut during the earlier part of the season when chemical fertilisers were 

 used in partial substitution for dung. Early maturity is a matter of very 

 great importance in regard to this crop as far as market purposes are 

 concerned. It happens that there is a large demand for Globe Artichokes 

 during what is called the London season, and there is then no difficulty 

 in disposing of the heads at good prices in the London market. Some 

 time in July, however, the demand usually falls off, so that the heads are 

 no longer saleable in the principal markets at prices remunerative to the 

 grower, who has to pay for carriage and other sale expenses. It is there- 

 fore important, in the case of this particular crop, if we are to appreciate 

 the full effect of the different systems of manuring, to regard not only 

 the total number of heads cut during the season, but also the proportion 

 which is produced in the earlier part of it, when the produce is in demand. 

 On this account we have each year differentiated between the total number 

 of heads cut and those cut before what may be called the " closing of the 

 market "in July. 



