Mar. 



Effect of Length of Day on Plant Growth 



591 



adding water to the soil, so that the average moisture contents would be 

 somewhat higher than these figures. Results of the moisture determi- 

 nations are shown in Table XIV. 



Table XIII. — Quantities of water added weekly to soybeatts, and the rain/all during the 

 period of the tests dealing with effect of differences in soil moisture, igi8 



Week ending- 



June 21. 

 38. 

 July s 



Aug. 



Sept. 6 



13 



From germination to maturity. 



From blossoming to maturity. 



12 by 12 net 

 shade. 



Gall. 



Gall. 



o. s 



l-o 



7.0 



2.0 



2.0 



6.0 



8.0 



18.0 



22.0 



22.0 



20.0 



18.0 



6.0 



14- o 



4.0 



GaU. 



(«) 



(°) 

 l-S 

 i.o 

 6-5 

 30 

 9.0 

 5.0 

 5-5 

 8.0 

 6.0 



2- O 



S-5 

 4.0 



6 by 6 net 

 shade. 



Gall. 



4.0 

 9.0 

 3-0 

 3-0 

 6.0 

 8.0 

 24-0 

 24. o 

 24.0 

 30-0 

 28.0 

 8.0 

 18.5 

 8.0 



87-0 



196.5 



Total (98. 0150. 5 57.0198.0150.5 57.0 



Equivalent to. . . . ''39.6 630.1 ^ 11.4 639.6 ''30.1 * 11. 4 



For period from Aug. 2 to Sept. 27 32.5 52.2 10.6 32.5 



Gall. 



6.0 

 8.0 

 18.0 



27. O 

 22.0 

 20.0 

 18.0 



6.0 

 14.0 



4.0 



Gall. 



{«) 

 (°) 

 (a) 



6.5 



S-S 

 8.0 

 6.0 



2.0 



4.0 



12 by 12 net 

 shade. 



Gall. 



9.0 



4.0 



3-0 



S-o 



7.0 



22.0 



24.0 



24-0 



30- o 



28.0 



8.0 



18.5 



8.0 



Gall. 

 4.0 

 2.0 

 9.0 

 4.0 

 3-0 

 50 

 7.0 

 20.0 

 220 



22-0 

 20-0 

 18.0 



6.0 

 14.0 



4.0 



iq6. 5 160.0 



Gall. 



4.0 

 2.0 

 90 

 4.0 

 3-0 

 5.0 

 7.0 

 18.0 

 4.0 

 5-5 

 8.0 

 6.0 



2- O 



5-5 

 4.0 



6 by 6 net 

 shade. 



Gall. 



4.0 



2.0 



9.0 



4.0 



30 



5-0 



7.0 



22.0 



25.0 



24. o 



30.0 



28.0 



8.0 



18. ■; 



8.0 



Gall 

 4.0 

 2.0 

 9.0 

 4.0 

 3-0 

 5.0 

 7.0 



20.0 

 22-0 

 22-0 



20. O 



18.0 

 6.0 



14. C 



4.0 



160.0 



"33-3 



Gall. 

 4.0 

 2.0 

 9-0 

 4.0 

 3-0 

 S-o 

 7-0 

 18.0 

 4.0 

 S-S 

 8.0 

 6.0 



2.0 



5-5 

 4-0 



Not shaded. 



Gall. 



9.0 

 4.0 



22.0 



24.0 

 24.0 

 30. o 

 28.0 



8.0 

 18.5 



8.0 



196. 5 



25.2 10.6 32.5 25.2 10.6 



Gall 

 4.0 

 2.0 

 9.0 

 4.0 

 3 



50 

 7.0 

 20.0 

 22.0 

 22.0 

 20.0 

 18.0 

 60 

 14.0 

 4.0 



i6o.o 

 ''33-3 



Gall.\ 



4.0 

 2.0 

 9-0 

 4-0 

 3-0 

 5-0 

 7- o 

 18.0 

 4.0 

 5-5 

 8.0 

 6.0 



In. 



87.0 



"None. 



ft Inches. 



Table XIV. — Water content of soil in boxes and in the field during the period of the tests 



with soybeans, igi8 



