BROOM-CORN EXPERIMENTS AT WOODWARD, OKLAHOMA. 29 



The yield of good brush, the total yield, the length of the brush, 

 and the percentage of good brush in the total yield vary widely be- 

 tween the different dates of seeding in nearly all years. Good to 

 excellent yields were obtained from one or more of the, seedings each 

 year, while those from other seedings were only fair to poor. In 

 1914 the yield of the cured brush was obtained on one lot only. The 

 other two lots were weighed green after thrashing and accidentally 

 placed on the racks to cure without being properly labeled, which 

 made later identification impossible. The season of 1915 was ex- 

 ceptionally favorable throughout, which resulted in excellent yields 

 from all the dates of seeding. The lowest yield in that year was 

 700 pounds from the seeding made July 7 and the highest 895 

 pounds from the seeding of June 19. In the variable season of 

 1916 the yields ranged from 742 pounds from the May 1 seeding to 

 only 350 pounds from the seeding made on June 1. In 1917 the 

 highest yield was obtained from the seeding made on July 1, the 

 next highest from the June 22 seeding, and the lowest yield from 

 the early seeding, April 16. In 1918, the poorest crop season in the 

 5-year period, the highest yield, 350 pounds, was from the seeding 

 made July 1, while the lowest, 250 pounds, was made from the 

 June 1 seeding. 



COMPARATIVE YIELDS IN THE DATE-OF-SEEDING EXPERIMENTS. 



Table X shows the annual and average acre yields of Acme broom 

 corn in the clate-of-seeding experiments. The seedings in the differ- 

 ent j^ears in some cases were not made on exactly the same date. 

 These dates in some cases varied as much as five days. The result- 

 ing yields are considered comparable and in this table are grouped 

 accordingly. Therefore, seedings made on May 22 and 27, on June 

 10 and 15, and on June 18 and 22 in different years are considered 

 as representing the same dates of seeding. 



The annual yields of the good and the poor qualities are shown 

 first. Then is given a 2-year average yield from the "plats on all 

 dates used in that period, and then a 3-year average yield for the 

 comparable dates in that period. It will be noted here that the 

 lowest average yield in the 2-year period was from the seedings made 

 on May 1 and that the average yields increased as the date of seed- 

 ing advanced, reaching the maximum of 446 pounds of good brush 

 from the July 1 seedings. In the 3-year period from 1916 to 1918, 

 inclusive, the highest average yield of good brush, 450 pounds, was 

 obtained from the July 1 seeding, while the second highest, 420 

 pounds, was from the seedings made on May 1. 



These results indicate that the best times to sow are from about 

 May 1 to 15 and from June 15 to July 1. August is usually dry 

 and hot, and such weather has a bad effect on yield and quality of 



