1030 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



raised the average weight by only about 20 per cent. Still, during 

 these five years, we only once reached, on our best plot, an average of 

 194 ounces per plant as pulled for market, while the best average of the 

 five seasons was only 12 ounces. 



CELERY, 1894-1898. 



Annual manuring per acre 



Average w eight per plant 

 when " pulled " 

 (five seasons, 1894-1898 

 inclusive) 





oz. 

 10-4 



8-5 



25 loads Dung, Phosphates (no Potash), and 1 cwt. Nitrate of 





Soda 



8-7 





8-6 



25 loads Dung, Phosphates (no Potash), and 2 cwt. Nitrate of 





Soda 



10-3 





9-4 



25 loads Dung, Phosphates (no Potash), and 4 cwt. Nitrate of 





Soda 



11-1 



Ditto, ditto (with Potash) 



120 



No Dung ; Phosphates (no Potash) and 4 cwt. Nitrate of Soda 



5-5 





75 



Although, therefore, the results present considerable interest, the 

 attempt to grow satisfactory plants with so little dung in dry seasons was 

 clearly unsuccessful. We therefore determined to approach more nearly 

 the ordinary custom of the market grower, and to use a much larger 

 quantity of dung placed in the trenches. This we have done since, at 

 the same time increasing the quantity of nitrate of soda. 



During the last three years the weather, on the whole, was propitious, 

 and we have grown really fine Celery. The following table gives the 

 average results : — 



CELERY, 1899, 1900, and 1901. 



Annual manuring per acre 



Weight per plant when 



" pulled " 

 (three years' average) 



100 loads (50 tons) London Dung (placed in trenches) . 



oz. 

 30-7 



50 loads (25 tons) London Dung (placed in trenches) 



32-3 



50 loads Dung, Phosphates (G cwt. Superphosphate in 1890 





and 1901 ; 10 cwt. Basic Bug in 1900), and 2 cwt. Nitrate 







303 s 



Ditto, ditto, with 1 cwt. Sulphate of Potash .... 



340 



50 loads Dung, Phosphates, and 4 cwt. Nitrate of Soda . 



3 10 



Ditto, ditto, with 1 cwt. Sulphate of Potash .... 



305 



50 loads Duntf, Phosphates, and (> cwt. Nitrate of Soda . 



32 0 



Ditto, ditto, with 1 cwt. Sulphate of Potash .... 



33-2 



No Dung ; Phosphates and K ewt. Nitrate of Soda . 



12-9 



Ditto, ditto, with 1 cwt. Sulphate of Potash .... 



22-8 



The figures shown here do not in themselves warrant any very clear 

 conclusion. In each of the three years the heaviest crop has been grown 

 on the most heavily dunged plot ; but the difference between the effect of 

 100 loads and 50 loads of dung per acre, when placed in the trenches, is 

 incommensurate with the very large cost of the extra dung. Nor, if we 



