23 

 in some type of fanning mill. 



It is the opinion of the writer of this thesis that no 

 separation of seed wheat or "barley is adequate that does not 

 select for size as well as weight. 



Herewith are presented a few references to literature on 

 the subject. It will "be noticed here also that there is a 

 certain amount of difference of opinion as to the value of 

 such selection "but it may "be possible that other factors have 

 affected the results of some of the dissenters or that their 

 machines have not "been mechanically what they should have been. 



Montgomery (56) found that the use of a fanning mill for 

 separating heavy and light seed wheat did not result in im- 

 provement in either the yield or the quality of the grain. 

 He concludes that; as every wheat plant contains both heavy 

 and light seed, the fanning mill will give about the same 

 kind of wheat, so far as inheritance is concerned, in the 

 light as In the heavy. 



The Ohio Station (57) pronounce against the fanning mill 

 but their test cannot be very well guarded as they refer to 

 hand~sorted tests which are giving results in favor of large 

 seed. 



Experiments in Missouri indicate that, while the differ- 

 ence is not great, the large seed gives the best yields. The 

 fact is also pointed out that more seed by weight should be 

 used when large seed is planted. In these tests the seed was 

 put first through a fanning mill and then through a grader, 

 separations being made .into three grades. (59) 



Burlison (60) found in a test of fanned and unfanned seed 

 vjheat of three varieties that the fanned showed an advantage 

 over the unfanned of 1.455 bushels per acre in yield. 



