STUDIES ON OAT BREEDING. 1 69 



The following points are brought out in Table 6 : 



1. The average yield of the four plots of the several vari- 

 eties ranged from 71.1 bushels per acre in the Siberian to 51.5 

 bushels in the Garton No. 5. This is a range of about 20 bushels 

 between the best and the poorest variety. This range is some 

 5 to 7 bushels less than in any of the preceding years. This is 

 no doubt due, in a large measure, to the fact that these are 

 averages of four plots rather than the yield of a single plot. 



2. The highest yielding single plot was the Early Pearl Plot 

 No. 495 which yielded at the rate of 84.4 bushels per acre. The 

 lowest yielding single plot was the Garton No. 5 (plot 501) 

 which gave 40.9 bushels per acre. The difference between the 

 highest and lowest single plot is 43.9 bushels. 



3. The average yield for all the varieties was 62 bushels per 

 acre. This is a better average production than in any of the 

 preceding years except 1910. This comparison is hardly fair, 

 however, since the varieties tested in different years were not 

 all the same. The yield of those varieties which have been 

 tested for all four years will be discussed in a later paragraph 



(Cf. p. 175). 



4. Of the ten highest yielding varieties in 1913, six were 

 varieties introduced in 191 2. It will be remembered that in 

 the discussion of Table 5 it was pointed out that only one 

 variety, the Early Pearl, introduced in 1912, was among the ten 

 best producers of that year. It is probable that this result is in 

 part due to acclimatization. It will be remembered that the 

 Early Pearl variety was originated in Maine. The other varie- 

 ties imported in 1912 were from Canada and the Middle West. 

 They did very poorly the first year but very much better the 

 second. This point is also discussed on page 177. 



5. The four out of the ten best yielding varieties which were 

 introduced before 1912 are in order, the Imported Scotch, Irish 

 Victor, Lincoln and Prosperity. It will be shown later (Fig. 

 59) that these are the four best yielding varieties on a four year 

 average. 



6. The Siberian which yielded best in 191 3 was a very poor 

 producer in 1912, yielding only 50 bushels per acre. The Early 

 Pearl, on the other hand, yielded very well in 191 3, standing 

 third in order of productiveness. The Senator which yielded 

 very poorly in 1910 and 191 1 is again at the bottom of the list in 



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