62 



THE ROYAL SOCIETY OF CANADA 



mined. The analyses of 1920 (Group 1585) indicate, therefore, the 

 position and nature of the saline content of the area to a depth of 

 five feet after six seasons' irrigation of approximately 1^^ acre feet 

 annually. Analyses of the water-soluble saline content of the soils 

 from Plot I and Plot II are detailed in the following tables; the 

 results obviously indicate the movement of the alkali from year to 

 year. 



Plot I. — ^Water-soluble Saline Content Expressed in Percentages on Air- 

 dried Soil. 



Crops. 



-1916, Wheat: 1917 and 1918, Western Rye Grass, Timothy and Brome: 

 1919, White Clover: 1920, Mixed Grasses and Clover. 



Plot I. — Briefly considered, the data of this plot indicate that 

 during the five years of the investigation the soil to a depth of 1'.5 

 (A and B) improved slightly but markedly as regards its saline content. 

 Under the conditions of the experiment irrigation had lowered rather 

 than raised the saline matter of the chief root feeding zone. 



