1006 JOUKNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Taking the average of the last three years, the results are in the same 

 direction, but no advantage has been derived from increasing the nitrate 

 of soda beyond 4cwt. per acre (used in conjunction with dung, phosphates, 

 and potash). 



Potash salts, during the first five years, proved to have little affected 

 our Cauliflowers, but in the last three years they appear to have materially 

 increased the crop, even where dung has been used year by year. 



The foregoing table does not show the results obtained on the plots to 

 which no dung has been applied. These are given in the following table, 

 and with them, for comparison, are again given the results of the most 

 important of the dunged plots. The average for the first five years and 

 the average for the last three years are shown separately. 



CAULIFLOWERS. 



Annual manuring per acre 



Annual cost 

 of manure 

 per acre 



Average for five Years 

 (1894-1898)* 



Average for three years 

 (1899-1901) 



Average 

 gross yearly 

 weight of 



heads 

 per acre 



Average 

 weight 

 per head 



Average 

 gross yearly 

 weight of 

 heads 

 per acre 



Average 

 weight 

 per head 





£ 





d. 



tons 



cwt. 



lbs. 



tons cwt. 



lbs. 



50 loads (25 tons) London 



















Dung .... 



10 



0 



0 



15 



0 



3-94 



18 1 



3-79 



25 loads (12| tons) London 



















Dung .... 



5 



0 



0 



12 



12 



3-31 



14 1 



3-05 



25 loads Dung, Phosphates 



















(no Potash), and 



















4 cwt. Nitrate of Soda . 



7 



15 



0 



16 



13 



4-31 



21 15 



4-49 



Ditto, ditto (with Potash) . 



8 



5 



0 



16 



5 



4-31 



23 16 



4-93 



No Dung ; Phosphates (no 



















Potash) and 



















4 cwt. Nitrate of Soda . 



2 



15 



0 



14 



11 



3-75 







Ditto, ditto (with Potash) . 



3 



5 



0 



15 



0 



3-94 







No Dung ; Phosphates (no 



















Potash) and 



















8 cwt. Nitrate of Soda . 



4 



15 



0 









20 9 



4-25 



Ditto, ditto (with Potash) . 



5 



5 



0 









22 0 



4-59 



Taking the first five years' average, it will be seen that the light 

 dressing of dung, with phosphates and 4 cwt. of nitrate of soda per acre, 

 produced a better result than chemical fertilisers alone, the quantity 

 of nitrate of soda used being the same. On the other hand, it is 

 interesting to notice that the chemical fertilisers without dung gave, at 

 little more than a third of the cost, as good a result as even fifty loads 

 of dung alone per acue. 



In the last three years the undunged plots received a much larger 

 dressing of nitrate, namely, 8 cwt. per acre, together with phosphates, 

 with or without potash. The results yielded by the last-named plot were 

 not much inferior to those obtained on the plot receiving a light dressing 

 of dung supplemented by chemical fertilisers including 4 cwt. of nitrate 

 of soda per acre, and were far in excess of the crops grown by the 

 unaided use of a heavy dressing of dung. 



As has been noticed in earlier reports, the advantage derived from the 

 use of chemical fertilisers is by no means confined to a mere increase in 



