126 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



large and medium seed together is also in favour of exploding (13 

 percent.). The crop on the whole charcoaled area was 25 per cent, 

 greater than that on the non-charcoaled area, though the figures 

 in the different parts are somewhat discrepant. 



Average Weights of Tubers per Plant (lbs.). 



Size of seed tuber. 



Number 

 of rows. 



Charcoal. 



No charcoal. 



Total. 



.ODED 













M 















Large 



4 



2' 009 





1712 



W 



Medium . 



5 



2-607 



196 



2-28 





Small 



4 



I'93 



192 



I925 



No 



Large 

 Medium . 

 Small . 



4 

 5 

 3 



3-15 



2-15 



191 



i-88 

 i-88 

 172 



251 

 20I 

 r8i 



Exploded 



' Dobbie's Provost ' does not seem to be so favourably affected 

 by the explosive treatment as was the case with ' Crimson Beauty ' 

 in the previous year. It will be interesting to see whether the exploding 

 two years ago will affect the crop which is soon to be planted on the 

 same plot of land. 



Soil Treatment for Strawberries. — Soil treatment by means of 

 injections is perhaps a sufficiently correlated subject to allow me to 

 record here a striking result obtained last summer. A three-year-old 

 strip of strawberry plants (' La Productive ' ), two deep, was divided 

 into three lengths of about five yards each. At the end of May injec- 

 tions were given by means of the Pal injector to the outer thirds, the 

 middle third being left untreated for control. The material used was a 

 mixture of about equal parts of carbon disulphide and tetrachloride, to 

 which was added a small proportion of crude Dippeloil. An injection 

 was made between each pair of plants, with one stroke of the piston on 

 the " single dose " plot, and two strokes on the " double dose " plot. The 

 weather was very favourable for ripening ; both quality and flavour 

 were consequently well developed. From August 23 onward most of 

 the pickings were counted ; only well-developed fruits were recorded, 

 and a foot breadth at the adjoining limits of the plots left out. In 

 general the countings agreed with the final sum in that the " double 

 dose " plot led, the " single dose " plot came a good second, and the 

 " control " plot was left far behind. The eventual sum of fruits picked 

 was as follows : — 



" Control " plot, 292. 



" Single dose " plot, 452. 



''Double dose " plot, 472. 

 It will be seen that the injected plots were practically the same 

 in yield, and that the double injection was not needed. Except for the 

 fact of the injections there is no obvious cause why the yield should have 

 varied in different portions of the strip, the exposure, soil, and age of 



