[shutt-burwash] 



'ALKALI" CONTENT OF SOILS 



69 



Series XI JI 

 (Irrigated). 



Vetch and Rye 



Lot 27, 476, Sumnierland, B.C. 



Collected August 8, 1919 



Sodium carbonate is present in all three groups of the series, but 

 in No. 1701 (Good Growth) it is not in sufficient quantities to be 

 injurious to the crop. Sodium sulphate is the chief alkali of No. 1699 

 (No Growth), but occurs in minor or insignificant amounts only in 

 No. 1700 and 1701. 



Group 1701. Good growth. This group was taken 110 feet west of 

 the bare spot (No. 1699). Nature of soil -.The surface soil "A" is a 

 rich dark brown sandy loam, well supplied with vegetable matter; 

 "B" is a brown sandy loam with some clay; "C" and "D," grey brown 

 sandy clay. All samples of the group were fairly dry when collected. 



The sodium sulphate content throughout the group is negligible. 

 The percentage of sodium carbonate is higher in the surfacs soil ("A") 

 than in the subsoil (as is usually the case with this class of alkali), but 

 evidently the amount (-087 per cent) is not sufficient to materially 

 affect the crop — vetch and rye. 



Group 1700. Poor growth; although the crop was sparse and 

 meagre there were no surface indications of alkali. The point of 

 collection was 30 feet west of the bare spots (Group No. 1699). Nature 

 of soil : "A," fine greyish brown sandy loam with pebbles, well supplied 

 with humus, slightly moist; "B," very similar to "A"; "C," greyish 

 white sandy clay, nearly dry, rather refractory on drying; "D," no 

 sample collected, as hardpan occurred at depth of 28 inches. 



