CTTLTIVATION. 179 



Thomas slag is less effective than superphosphate, but 

 produces an after effect ; 



An addition of potash by itself (in 1892) increased the 

 crop by about 400 lb. of cones per acre ; 



Chloride of potash is more effective than the sulphate ; ^ 

 whilst an addition of about S^ oz. of sulphate of magnesia 

 per stock favourably influenced the colour of the cones. 

 The soils on which these Marienhof experiments were 

 performed are loamy and humous sands. 



Ever since 1891 Adorno of Kaltenberg, near Tettnang, 

 has used Thomas slag and kainit in addition to stall 

 manure and compost — ^and occasionally nitrate of soda — for 

 hops. The most favourable results were obtained by ap- 

 plying to each stock a half dressing of stall manure in 

 conjunction with 100 grams (3^ oz.) of 18 per cent. Thomas 

 slag and 125 grams (4| oz.) of kainit. Like many others, this 

 experimentalist advises caution in the use of nitrate of soda. 



Noteworthy experiments are those carried out in the 

 hop gardens of Count Schwarzenberg at Hermanka, near 

 Eocov.^ These afford certain information as to the pecu- 

 niary advantages resulting from the application of artificial 

 manures to hops. Thus, it was found that, with hops 

 at about £7 per cwt., the most profitable results were ob- 

 tained from a full dressing of — 



Per acre. Per stock (2,727 to the acre). 

 Lb. Grams. 



whereas when the price falls to £5 a simple dressing with 

 kainit — 780 lb. per acre — would pay best, full manuring 

 being no longer profitable at this price. 



' The converse is reported from other quarters. 

 '^ Oesterr. landw. Wochenblatt, 1897. 



