236 



THE ROYAL SOCIETY OF CANADA 



The percentages of sodium sulphate and sodium carbonate in 

 the root zone are evidently well beyond the limit of safety. While 

 in some cases it has been found that .975 per cent sodium sulphate 

 is not sufficient to completely prevent growth, this accompanied by 

 appreciable amounts of sodium carbonate as in this instance has 

 always proved inhibitive to vegetative growth. 



Wheat 



Series XV. Sec. 35, Tp. 18, R. 14, W. of the 4th Meridian. 



This series of samples was taken in August, 1921 from an irri- 

 gated wheat field in the Duke of Sutherland's property — the last 

 application of water having been made on the 25th of June. Gen- 

 erally viewed the field bore a healthy stand of wheat but seepage 

 from the canal was beginning to cause distress in spots. 



Wheat 



Sec. 35. Tp. 18, Rge. 14, W. of the 4th Meridian. (Irrigated), 



Collected August 18th, 1921. 



