Fertilisers for Market Garden Crops. 477 



obtained by the use of light dung combined with phosphates, 

 potash salts and nitrate of soda. Our results for these two 

 years are shown in the preceding table 



Potash salts produced throughout a very decided effect. 

 Indeed, on the plots (not above quoted) on which no dung was 

 used, the half-plots receiving potash salts averaged about double 

 the yield of the half-plots from which potash salts were with- 

 held. 



Our experience with spring onions is too limited for any 

 more specific suggestions than indicate themselves in our 

 results. 



Tripoli Onions. 



We have been more successful with Tripoli onions. The fol- 

 lowing are some of our results over five years : — 



Annual Manuring. 



Average Annual Weight 

 of Onions per acre 

 (excluding unsound or 

 unmarketable bulbs). 



Annual Cost of 

 Manure per 

 acre. 



Light Dung ... 



Ton Cwt. 

 7 16 



£ s. d. 

 500 



Heavy Dung... 



10 10 



10 0 0 



Light Dung and Phosphates, Potash 

 and 2 cwt. Nitrate of Soda per 

 acre 



n 7 



7So 



It may be added that comparison between the potash and 

 non-potash plots shows that potash salts are an important 

 constituent of the fertilisers to be used for Tripoli onions. 

 This was strikingly shown on one of our undunged plots in a 

 recent season. The plot was manured with 6 cwt. of super- 

 phosphate and 8 cwt. of nitrate of soda per acre, one half of 

 the plot receiving sulphate of potash at the rate of 1 cwt. per 

 acre, the other half being kept without potash salts. On the 

 latter half-plot the plant entirely failed, and there were no 

 onions at all to gather, whereas on the potash half we had 

 10 tons per acre of onions, all of which were sound and 

 marketable. 



Generally speaking, we should recommend for this crop a 

 light dressing of dung, with superphosphate and a dressing of 

 nitrate of soda. The quantity of nitrate of soda used should 



