1 02*2 JOURNAL OK TIIK ROYAL HORTICULTURAL H001KTY. 



GLOBE A.RTIGH0KE8. 



I'lvc yours' average ICXTKA yield of ( 4 ■<»!>«• 



/UrtdofcokM pw tort, duf bo utn manurt in 



■jr> loftdi Dong pot 



ton 





llMMVUMC In 



IoImI might 



per noro 



1 DOrOftM In 

 total DOtdl 

 per iiere 



[uotoim in 



" early " howls 

 per uoro 









boo owti 







*2f> extra IoiwIh Duuk (50 in 



all) . 





1 1 



6,870 



:»,r>oo 



Phosphate^ Potato Balti 



and 



1 cut, 









Nitrate of Soda * ■ 







i r> 



6,660 



6,160 



Phoiphatei, Potaih Sails 



and 



9 cut. 







Nitrate of Soda * . 







18 



4,810 



u.tuo 



riioHphatcH, Potash Salts 



and 



■1 cwt. 









Nitrate of Soda * . 







1 » 



6,010 



4,780 



* Sr<> note to previous table. 



It may bo observed that it is the number rather than tho size of tlio 

 heads which is a Hooted by tlio manuring, tho average size or weight of 



the heads having been very nearly the same throughout tho plots. On 

 tho average it will ho seen that tho plot receiving only 1 cwt. of nitrate 

 of soda |»or aero (in conjunction with phosphates and potash) has given 

 soinowhat hotter results than its neighbours which received larger quan- 

 bitiefl of nitrate. Although, however, this has hoon tho case on tho 

 average of years, nevertheless in two of the seasons tho largest number 

 of early heads was yielded by the plot receiving 1 cwt. of nitrate of soda 

 per aero, and wo should ho inclined at present to recommend either 2 cwt. 

 or I cwt. pel aero. 



Tho average cost of tho chemical fertilisers on the throe plots referred 

 to in tho foregoing table has boon about £2 HKs. per acre per annum, 

 ii against tf> for tho extra, 2f> loads of dung on the dunged plot. On the 

 other hand, the extra yield of " early " heads has averaged 1,030 as 

 against !l,f>J)0. We have therefore not only an average saving of X'2 lO.v. 

 per acre per annum in the cost of manure by the substitution of tho 

 chemical fertilisers in place of extra dung, but wo have also on the 

 average a greater increase of produce by no less than 1,010 heads, or, 



sav, ho " market " dozen. The price wo have actually obtained for our 

 Artichokes has varied from tts little as (></. to as much as 2s. (></. per 

 do/en, and in one year averaged as much as is. fit/, after deduction of 

 cost of carnage imd sale expenses. If, however, wo take the value at 

 l». per dozen, tho HO dozen extra heads would at that rate be worth £4, 

 which, added to the average saving of x2 I0,s. per aero in manure, makes 

 ft profit of £6 10*. per acre duo to the partial substitution of chemical 

 fertilisers for dung. This is an average result; but in one year lHi)7 — 

 when tho plants were in their second year of bearing, the profit per acre 

 actually obtained by tho partial substitution of chemical fertilisers for 

 dung wm | considerably more than twice that sum. 



The oiVoct of potash on this crop has been already alluded to. In the 

 case of (Hobo Artichokes, oven when dung has boon used, the elVect of 

 potash salts has boon remarkable, and indicates, as will bo seen from tho 



