28 



BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 



in the same year as in plats sown on the same date in the different 

 years. The lowest. 60.7 per cent, in the 5-year period was from the 

 seeding made June 1, 1918, and the highest, 97.5 per cent, was from 

 the seeding made on May 24, 1917. In the former case it will be 

 noted in Table II, which shows, the daily and monthly precipitation, 

 that the crop was grown under very dry conditions. In the latter, 

 the month of August, at which time the crop was heading, was 

 quite favorable. 



The average height of the plants -in the -different years ranges 

 from 3.5 to 6.3 feet. The height depends largely upon the rapidity 

 of growth during the first 30 or 40 days of the vegetative period. 

 When the height of 6.3 feet resulted from the seeding made June 19, 

 1915, the soil was in a moist condition and remained so for some 

 time, with a temperature favorable for rapid growth. At other 

 times during several of the 3 T ears when the plants reached a height 

 of less than 4 feet, the crop encountered a long droughty spell during 

 the vegetative period. 



Table IX. — Agronomic data for Acme broom corn in the date-of-seeding experi- 

 ments at the Woodward (Okla.) Field Station during the 5-year period from 

 191-'t to 1918, inclusive. 



Date of seeding. 



Row space 

 (inches). 



Length of pe- 

 riod (days). 



Percentage 

 of— 



tt'M 



Yield of brush 

 per acre 

 (pounds). 



Length of 



brush 

 (inches). 



Season of 1914: 



May 14 



June 1 



June 18 



Season of 1915: 



May 25 



June 10 



June 19 



July 7 



Season of 1916: 



May 1 



May 15 



May 22 



June 1 



June 15 



July 1 



Season "of 1917: 



April 16.... 



May 2 



May 15 



May 24 



June 2 



June 22. . . . . 



July 3 



Season of 1918: 



April 16. . . . 



Mayl 



May 14 



May 27 



June 1 



June 15 



July 1 



8.6 

 5.6 

 5.9 



5.8 



6.0 

 8.7 

 5.8 

 5.9 

 5.9 



6.3 



6.0 

 5.9 

 7.1 

 6.7 

 7.4 

 1(1.5 



27.6 

 22. 6 

 39.4 

 7. 5 

 7.0 

 5.8 

 8.9 



5.8 



73 



4.4 



69 



o. / 



64 



5.2 



77 



6.2 



78 



4.4 



80 



4.9 



69 



5. 5 



70 



5.2 



72 



6.6 



70 



5.5 



64 



5.1 



53 



5.4 



51 



4.9 



124 



4.6 



110 



4.9 



106 



6.5 



107 



5.9 



92 



6.1 



95 



6.1 



88 



10.3 



92 



10.2 



84 



14.6 



83 



5.8 



69 



6.6 



76 



5.4 



75 



8.3 



'.1 



84 

 90 

 93 

 133 





 

 



4.8 

 28.1 

 20.4 

 15.8 



5.2 

 13.0 

 24.1 



5.2 

 13.8 



9. 7 



21.5 

 24.7 

 16.8 

 8.7 

 11.9 

 17.6 

 41.0 



62.7 



55." 1 



62.8 



22.6 



6.5 



7.2 



7 3 



81. 8 

 68.0 

 77.9 



93.0 



86.7 



88.2 



89.0 

 70.0 

 83.6 

 83 

 91.3 

 79.3 



83.3 

 86.0 

 90.8 

 97.5 

 92.6 

 83.1 

 75.6 



91.3 

 80.0 

 90.5 

 66.6 

 60.7 

 84.4 

 76.7 



4 

 4.3 

 4.3 



6.3 



4.8 

 4.5 

 3.8 

 4.0 

 3.8 

 3.8 



4.0 

 5.0 

 5,0 

 5.5 

 5.5 

 4.5 

 5.0 



3.8 

 3.5 

 4.5 

 3.5 

 3.5 

 3.5 

 3.8 



305 60 



600 

 750 

 875 

 630 



717 

 556 

 378 

 328 



475 

 457 



275 

 350 

 450 

 394 

 507 

 625 

 633 



286 

 193 



214 

 283 

 238 



129 



260 



365 



(7612 



21.0 



23.0 

 22.0 

 20.0 

 19.0 



23.0 



23.0 

 18.5 

 20.0 

 22.5 

 22.0 



12.5 



14.0 

 14.0 

 17.0 

 18 

 19.0 

 20.0 



22.5 

 19.0 

 22.5 

 17.5 

 18.0 

 14.5 

 17.0 



23.0 

 22.0 

 20.0 

 19.0 



14.0 

 19.0 

 16.0 

 13.5 

 18.0 

 19.0 



11.0 

 12.0 

 12.0 

 13.0 

 15.0 

 15.0 

 14.0 



18.5 

 16.0 

 15.5 

 15.5 

 12.5 

 11.0 

 11.5 



79.4 

 93.3 

 97.8 

 90.0 



96.6 

 98.9 

 87.2 

 93.7 

 87.4 

 88.9 



80.0 

 76.7 

 84.7 

 91.0 

 93.4 

 93.5 

 92.7 



83.3 



79.4 

 93.8 

 91.1 

 95.0 

 47.4 

 74.3 



a Weight of seeded brush before curing. 



