VERNALIZATION EXPERIMENTS WITH FORAGE CROPS 9 



Table 6. — German foxtail millet vernalized and sown in the open in rows 20 inches 

 long and 6 inches apart, and harvested Aug. 18, 1933 



[Maturity in checks and vernalized seed in all cases was practically the same] 





Vernalization 



Germi- 

 nation 



Culms 



He 



ght 



Date 

 first 

 head 



Treatment 



Days 



Ratio of 

 water 

 to seed 



Tem- 

 pera- 

 ture 



July 5 



Final 



Check ! - 



Number 



Percent 



° C. 



Good. 

 Fair- 

 Poor.. 

 Fair- 

 Poor.. 

 Good. 

 Fair... 

 Good. 

 _ .do— 



Number 

 54 

 30 

 17 

 29 

 16 

 49 

 33 

 55 

 61 

 69 

 72 

 32 

 45 



Inches 

 26 

 30 

 30 

 30 

 19 

 21 

 20 

 19 

 16 

 16 

 16 

 16 

 16 



Inches 

 64 

 72 

 68 

 68 

 64 

 64 

 64 

 68 

 64 

 64 

 68 

 68 

 64 



July 23 

 Do. 





5 

 5 



7 



22 

 22 

 26 



22 

 22 

 22 



D0.2 _ : 



Do. 



Do.* 



Later. 



Check 1 - - 



Aug. 1 

 July 29 

 July 23 

 July 29 

 Aug. 1 

 Do. 





6 



26 



22 



Check 1 





6 



26 



22 



Check 1 





7 

 7 

 9 

 9 



26 

 26 

 26 

 26 



22 

 22 

 22 

 22 



_:_ do— 



...do— 

 ...do... 



.-..do- 



Do. 6 .. . --- 



Do. 



Do.*. - 



Do. 



Do.s 



Do. 







1 Checks were seeded on the same dare as the vernalized seed. 



2 Vernalized in alternating light and darkness and then dried before seeding, May 22, 1933. 



3 Vernalized in darkness and seeded without drying, May 29, 1933. 



i Vernalized in alternating light and darkness and seeded without drying, May 29, 1933. 



5 Vernalized in darkness and seeded without drying, June 1, 1933. 



6 Vernalized in alternating light and darkness and seeded without drying, June 1, 1933. 



In table 4 the temperature was varied day and night with 32° C. for 

 the day and 24° for night. The seed sown January 19 differed from 

 that sown January 1 1 in that it was dried subsequent to the vernaliz- 

 ing treatment. The results with the three varieties used in this 

 experiment show no injury from drying and no effect from the vernal- 

 ization. 



The plantings of August 24 and September 5 (table 5) differ only 

 in treatment of the seed subsequent to vernalization. Seed of the 

 August 24 planting was dried slowly for 4 days, while in the Septem- 

 ber 5 planting the drying was continued for 15 days. The results of 

 the two plantings are similar and show no effect from vernalization. 



The plantings made in the open (table 6) show some differences, 

 but these are not sufficiently consistent to be considered significant. 

 The tallest plants were from vernalized seed, but the time of maturing 

 was about the same in all lots. In the May 29 seeding, one lot of 

 vernalized seed was taller than the check while the other was equal. 

 In this planting, the date of appearance of the first heads showed a 

 week's difference in the two check lots, but no difference could be 

 noted in the time of maturing of these and vernalized lots. The two 

 tallest lots in the June 1 seeding were from vernalized seed, but no 

 difference could be noted in time of maturing. 



The results with Sudan grass given in table 7 are much the same as 

 with the foxtail millet and gave little or no indications of vernalizing 

 effects. While in the September 5 seeding one vernalized plant was 

 the earliest in bloom, the behavior of the other plants was such that 

 this is not significant. 



