[dymondI elevator SCREExMNGS 75 



Screenings from the 1915 crop contained a considerable proportion 

 of broken whe.at and a relatively low percentage of weed seeds. The 

 smaller percentage of weed seeds was due to the excellent crop con- 

 dition prevailing that season. The fall was dry, causing the wheat to 

 crack in threshing, which accounts for the high proportion of cracked 

 wheat. 



The 1916 crop was poor, much of the wheat belonging to the lower 

 grades. As a consequence the screenings from that crop contained 

 a much higher percentage of weed seeds. Many of the grain inspectors 

 at Fort William made the observation that hare's-ear mustard 

 (Conringia orientalis (L) Dumort) was unusually prevalent in the 1917 

 crop. No efforts have been made to study this phase of the subject 

 systematically. 



In connection with the distribution of différent weeds in Western 

 Canada, the following information was collected, at the suggestion 

 of the writer, by Mr. W. Wilson, a deputy grain inspector of the 

 Board of Grain Commissioners at Fort William. 



A record was kept by Mr. Wilson of the weed seed impurities and 

 point of shipment of 793 cars of grain arriving at the Western elevator 

 in the fall and winter of 1915. Nearly all of the grain covered by these 

 records was wheat; only a few cars of oats and barley are included. 



The following table indicates the number of cars of grain from 

 different electoral districts which contained the more common 

 impurities. Districts from which fewer than ten cars were received 

 are not included in the table. 



