12 BULLETIN 1092, U. S. DEPARTMENT OF AGRICULTURE. 



Table 1. — Relative values of characters used in comparing strains of fiber fla^. 



Characters compared. 



Assigned 

 value. 



Characters compared. 



Assigned 

 value. 



Weight of thrashed stems 



Per cent. 

 45 

 16 

 15 

 15 





Per cent. 

 5 



Length of stem to first branch 





4 



Strength of fiber 



Total. 





Weight of seed 



100 









The score card has been applied to 24 selections and to White- 

 Blossom Dutch and Blue-Blossom Dutch, two unselected varieties 

 of fiber flax. (Table 2.) Without exception all the selections are 

 superior in stem length to the unselected commercial varieties. The 

 latter are chiefly superior in seed yield only and score a total percent- 

 age lower than all except one selection which has a low yield of 

 thrashed straw. 



Table 2.- 



-Score card applied to 24 taU fiber- flax selections and 2 varieties of 

 commercial fiber flax. 



[Based on data for the years 1914 to 1920, inclusive.] 



Number 

 or name. 



Weight of • 

 thrashed straw. 



Weight of seed. 



Per 





Per 





rod 



Score. 



rod 



Score. 



row. 





row. 







Per 





Per 



Grams. 



cent. 



Grams. 



cent. 



568 



45 



98.98 



15 



577 



45.7 



84.6 



12.68 



567.5 



45 



97.6 



14.68 



641 



50.16 



98.6 



14.81 



543 



43 



88.2 



13.25 



509 



40.3 



85.6 



12.87 



517 



40.9 



90.5 



13.6 



640 



50.8 



90.3 



13. 58 



530 



41.5 



69.3 



10.40 



681. 5 



54 



99.7 



14.96 



623 



49.4 



93.2 



14 



515 



40.8 



83.7 



12.59 



531 



42 



108.9 



16.37 



546 



43.4 



67.2 



10.10 



525 



41.6 



86.8 



13.03 



400 



31.7 



91 



13.69 



527 



41.8 



121.6 



18.25 



497 



39.4 



95 



14. 28 



522 



41.3 



107.2 



16.1 



607 



48.1 



110.0 



16.61 



51S 



41.2 



77.1 



11.60 



490.5 



38.9 



74.6 



11.20 



520 



41.3 



112.2 



16.85 



597 



47.2 



144.2 



21.7 



449 



35.6 



133.3 



20.5 



547 



96. 5 



149.4 



22.4 



Length of Stem. 



To 



first 



branch. 



Score. 



Breaking strain. 



Aver- 

 age per 

 milli- 

 meter 



of 

 diam- 

 eter. 



Score. 



Resistance to — 



Lodg- 

 ing. 



Flax 

 wilt. 



Total 

 score. 



1905 



1901 



1903 



1904 



1906 



1907 



1908 



1910 



1911 



1812 



1914 



1915 



1919 



1920 



1921 



1922 



1923 



1924 



1925 



1926 



1927 



1928 



1929 



1931 



Blue-Blos- 

 som Dutch 



White-Blos- 

 som. Dutch 



Centi- 

 meters. 

 65.91 

 69.2 

 65.9 

 64.5 

 64.8 

 65.7 

 67.2 

 64.9 

 67.5 

 66. 55 

 67.6 

 67.7 

 66.3 

 67.25 

 66.1 

 62.35 

 57.5 

 64 



65.4 

 59.5 

 60.6 

 58.4 

 60.2 

 61.7 



49.6 



49. 25 



Per 

 cent. 

 16 

 19.2 

 16 



14.6 

 14.9 

 15.6 

 17.26 

 15 



17.56 

 16.60 

 17.66 

 17.76 

 16.40 

 17.30 

 16.20 

 12.52 



7.75 

 14.13 

 15.66 



9.51 

 10.78 



8.62 

 10.39 

 11.86 











Kilo- 

 grams. 

 2.77 



03.35 

 1.74 

 2.49 



a 2. 57 



a 2. 49 

 2.22 

 1.96 

 2.32 



"2.83 

 2.19 

 2.04 



a 2. 08 

 2. .52 



2.32 

 2.72 

 2.18 

 1.45 

 2.90 

 2.07 



"3.58 

 1.60 



01. 69 



01.94 

 01.35 



Per 

 cent. 

 15 

 15 



18.7 

 9.43 

 13.5 

 13.91 

 13.5 

 12.01 



10. eo 



12.56 

 15.32 

 11.87 

 11.05 

 11.26 

 13.65 

 12.56 

 14.76 

 11.80 

 7.85 

 15.70 

 11.60 

 19.37 

 8.66 

 9.2 



10.5 



7.35 



Per 

 cent. 



Per 

 cent. 



4 







4 



1 















4 



2.5 



2 



2 



1 



4 



1 



1 







2 



1 



2 



2 



1 



1 



1 









 



Per 



cent. 

 97 

 94.58 



101.29 

 90 



84.65 

 82.65 

 85.26 

 95. 39 

 84.56 



102. 12 

 98.38 

 84.02 

 89.82 

 86.48 

 85.48 

 72.47 

 89.56 

 79.61 

 83.91 

 93.92 

 75.78 

 79.09 



72.6 

 72.75 



a Record of only one year. Where no record is avaOable the brealdng-strain score of the cheek is inserted. 



