52 



BULLETIN 836, IT. S. DEPARTMENT OF AGRICULTURE. 



for all lots. The percentage of good brush that year was quite low, 

 ranging from less than 1 per cent in several lots to as high as 24.4 

 per cent in one lot only. Good brush as considered in this experiment 

 includes those heads which have uniformly long, round fiber full 

 and even at the tip and evenly attached to the peduncle at the base. 

 These heads are suitable for the improvement of the strain. In 

 1918 there was a slight increase in the percentage of good brush over 

 that of the previous 3 7 ear, as shown in Table XXVI. 



Table XXVI. — Row space per plant, the percentage of stickers, of headed stalks, 

 and of good heads for each lot of broom corn grown in the nursery at the 

 Woodward (OkJa.) Field Station during the two years 1917 and 1918, with 

 the 2-year averages. 





Row space per 

 plant (inches). 



S uckers (per 

 cent). 



Percentage of 

 stalks headed. 



Percentage of 

 good heads.' 



Variety and lot (C. I. No.). 



1917 



1918 



2-year 

 aver- 

 age, 

 1917 

 and 

 1918. 



1917 



1918 



2-year 

 aver- 

 age, 

 1917 

 and 

 1918. 



1917 



1918 



2-year 

 aver- 

 age, 

 1917 

 and 

 1918. 



1917 



1918 



2-year 

 aver- 

 age, 

 1917 

 and 

 1918. 



Standard: 



446 



7.6 



6.8 



7.3 



7.0 



8.4 



7.0 



7.9 



8.0 



6.7 



7.3 



8.0 



7.4 



7.4 



8.6 



7.3- 



7.0 



7.3 



7.2 



7.6 



7.5 



7.0 



7.6 



7.4 



7.4 



7.6 

 8.0 

 7.0 

 6.3 

 7.3 

 6.9 

 8.0 

 6.8 

 6.6 

 7.0 

 7.0 

 6.6 

 6.6 

 6.4 



7.1 



6.8 

 6.4 

 12.2 



8.0 

 6.8 

 6.6 



7.4 

 6.8 

 6.9 

 9.6 

 8.2 

 6.9 

 7.3 



6.7 



6.8 



5.2 



7.7 



6.9 



9.3 



34.3 



29.3 



4.4 



16.9 



30.9 



7.7 



7.7 



13.6 



6.9 



4.7 



13.5 



9.4 



3.7 



4.9 



5.0 



4.6 



9.3 



7.4 



17.1 

 29.8 

 10.0 

 3.1 

 4.0 

 3.0 

 15.3 

 46.3 

 5.2 

 11.1 

 8.5 

 5.5 

 2.0 

 5.0 



5.1 

 5.3 

 9.5 



17.7 

 7.0 

 6.4 

 5.5 



5.9 

 6.1 

 7.4 



12.7 

 7.0 

 7.9 



19.9 



85.6 

 81.5 

 89.0 

 93.4 

 90.1 

 87. 1 

 73.5 

 74.6 

 89.8 

 82.3 

 75.7 

 82.8 

 87.0 

 82.6 

 89.6 

 91.1 

 83.3 

 72.1 

 84.3 

 79.3 

 78.5 

 89.0 

 79.1 

 79.1 



95.6 

 92.5 

 94.0 

 95.3 

 93.3 

 90.3 

 95.7 

 87.1 

 95.2 

 97.2 

 94.3 

 92.8 

 93.0 

 90.8 



86.0 

 83.4 

 58.1 

 55.0 

 55. 6 

 80.2 

 90.1 



85.8 

 82.5 

 73.6 

 74.2 

 72.9 

 83.7 

 81.8 



7.8 

 6.4 

 3.9 

 24.4 

 21.8 

 6.0 

 3.1 

 4.3 



87.1 

 87.8 

 94.3 

 95.4 

 71.4 

 81.5 

 78.1 



47.5 



S56 



47.1 



560 



49.1 



561 



59.9 



563 



46.6 



565 



43.8 



580 



40.6 



580-2 























582-2 



7.8 

 12.9 

 6.8 



7.6 

 10.5 



7.1 



15.1 

 12.9 

 7.5 



16.0 

 21.9 



7.6 



84.8 

 86.6 

 52.3 



83.6 

 81.2 

 67.6 



3.2 

 18.3 

 6.2 



.9 

 1.1 



.5 



.5 

 5.7 



.6 

 7.1 

 7.3 

 3.2 

 4.6 

 8.0 

 1.6 



25.4 



16.8 



19.9 



11.8 



7.5 



2.8 



15. 5 



16.9 



24.1 



18.3 



6.8 



12.7 



4.8 



3.3 



79.2 

 87.9 

 93.9 



41.2 



583 



53.1 



584 ." 



50.1 



585 





587 



















588 





































591 



6.7 



7.0 



4.9 



9.2 



84.2 



83.8 



82.2 



44.0 



592 





593 



7.0 

 7,3 



7.3 



7.4 



5.4 

 3.1 



4.6 

 4.0 



87.0 

 90.5 



85.7 

 84.9 



77.8 

 82.1 



42.5" 



594 



44.7 



600 





602 



7.4 

 7.0 



7.5 

 7.2 



8.5 

 15.1 



6.6 

 12.2 



88.4 

 64.9 



88.7 

 72.0 



84.0 

 92.4 



44.3 



604 



50.2 



607 





Dwarf: 



243 



7.8 

 7.9 

 7.4 

 6.6 



14.5 

 6.5 

 7.0 

 7.0 

 7.7 

 7.3 

 7.2 

 7.2 



14.3 



7.7 

 8.0 

 7.2 

 6.5 



10.4 

 6.7 

 7. 5 

 6.9 

 7.2 

 7.2 

 7.1 

 6.9 



10.5 



18.8 

 15.9 

 18.9 

 6.3 

 12.1 



4.6 

 30.1 

 14.9 



9.2 

 13.8 

 12.4 

 24.5 



18.0 

 22.9 

 14.5 

 4.7 

 8.1 

 1.5 

 10.0 

 38.2 

 10.1 

 10.2 

 11.2 

 9.0 

 13.3 



85.2 

 87.8 

 78.4 

 89.3 

 56.4 

 65.6 

 89.0 

 76.4 

 81.4 

 88.9 

 81.9 

 74.5 

 74.8 



90.4 

 90.2 

 89.2 

 92.3 

 74.9 

 78.0 

 92.4 

 81.8 

 88.3 

 93.1 

 88.1 

 83.7 

 83.9 



87.7 

 80.4 

 80.7 

 92.5 

 40.0 

 81.9 

 77.2 

 96.7 

 89.8 

 86.8 

 93.2 

 93.0 

 68.1 



56.6 



442 



48.6 



535 



50.3 



557 



52.2 



558 



23.8 



559 



42.4 



564 



46.4 



595 



56.8 



596 



56.9 



597 



52.6 



598 



50.0 



599 ' 



52.9 



605 



36.5 



606 



















1 Good heads as considered in the nursery work were heads whose conformation was near enough per- 

 fect to be used as seed for propagation or for the improvement of the strain. 



Dwarf broom corn had a much higher average percentage of stalks 

 headed and a somewhat higher average of good brush in 1917 than 

 the Standard. In 1918 Dwarf broom corn led the Standard in both 

 the average percentage of stalks headed and of good brush, but with 



