60 



Series X 

 (Irrigated). 



THE ROYAL SOCIETY OF CANADA 

 Wheat 

 Sec. 35, Tp. 18, Rge. 14. W. of the 4th Mer. 



Collected July 16th, 1919 



The alkali of these groups, it will be seen, is chiefly sodium sul- 

 phate. Sodium carbonate is present in small percentages in Group 

 1688 and both magnesium and calcium sulphate were found in Group 

 1686. Chlorides are absent throughout the series. 



Group 1688. Fair to good growth of healthy appearance. Height 

 of crop at date of collection, about 32 inches. Location of group 

 about 33 feet east of "bare spot" (Group 1686), but no surface appear- 

 ance of alkali. Nature of soil: "A," brown clay loam rich in humus, 

 dry; "B," brown, plastic clay, moist, air-dried to hard refractory 

 lumps; "C" and "D," a stiff clay essentially similar to "B." 



The percentage of sodium sulphate in the surface six inches ("A") 

 cannot be regarded as at all serious; in "B," "C" and "D" it is very 

 uniform and decidedly higher, approaching the usually accepted 

 limits of tolerance. The group contains sodium carbonate, the con- 

 centration being slight though not altogether negligible. 



Group 1687. Poor and meagre growth; crop evidently distressed. 

 Group collected about 15 feet east of "bare spot" (No. 1686); alkali 

 showing on surface. Nature of soil: "A," greyish brown clay loam 

 with silt, moist; "B," brown clay, damp, refractory on air-drying; 



