EXPERIMENTS IN FIELD PLOT TECHNIC 



29 



In this case the advantage of Oderbrucker over Featherston was 

 almost tripled by competition, and Red River, which yielded less than 

 Featherston in the interior rows, excelled it materially in yield in the 

 border rows. 



The oats varieties tested in rows running north and south in 1919 

 showed marked effects of competition in several cases. The follow- 

 ing will serve as an example: 



In this case Lincoln, yielding 12 per cent less than Fulghum in in- 

 terior rows, yielded 13 per cent more than Fulghum in border rows; 

 while the advantage of Kherson Selection over Fulghum was in- 

 creased from 11 per cent to 71 per cent. 



Marked competition is hardly to be expected in the oats strain test 

 of 1919, regardless of the direction of the rows, because of the sim- 

 ilarity of the strains in varietal characters. Three strains which proved 

 to be taxonomically unlike Red Rustproof were included in this test, 

 and each of these shows clearly the effects of competition. For ex- 

 ample, strain 0124, which was classified as Fulghum, gave the follow- 

 ing yields in comparison with the adjoining strains, 0127, classified as 

 Kherson, and 0133, classified as Red Rustproof : 



