c(f2 Journal of Agricultural Research voi.xviii, no. h 



(4) Exposed to light from daylight till 10 a. m. and from 2 p. m. to 

 darkness. Planted June 14, placed in dark house June 16, up June 19. 

 First blossoms appeared August 20 on test plants and August 23 on 

 controls. Average height of test plants 24 to 25 inches and that of 

 controls 42 to 43 inches, 

 (d) BiLOXi,* very late maturing: 



(i) Exposed to light from 10 a. m. to 3 p. m. Planted May 8, up 

 May 17, and placed in dark house May 20. First blossoms appeared 

 June 1 6 on test plants and September 4 on controls. Average height of 

 test plants 6 to 7 inches and that of controls 57 to 58 inches. See Plate 

 68, A. Test plants were restored to normal light exposure June 20. 



(2) Exposed to light from 9 a. m. to 4 p. m. Planted May 8, up 

 May 17, and placed in dark house May 20. First blossoms appeared 

 June 15 on test plants and September 4 on controls. Average height of 

 test plants 1 1 inches and that of controls 57 to 58 inches. See Plate 67. 



(2a) Exposed to light from 9 a. m. to 4 p. m. Planted June 10, up 

 June 15, and placed in dark house June 24. First blossoms July 22 on 

 test plants and September 1 5 on controls. Average height of test plants 

 15 to 16 inches and that of controls 56 to 58 inches. 



(3) Exposed to light from 6 a. m. to 6 p. m. Planted and placed in 

 dark house June 1 1 , up June 16. First blossoms appeared July 14 on test 

 plants and September 8 on controls. Average height of test plants 23 to 

 24 inches and that of controls 54 to 55 inches. See Plate 68, B. 



(4) Exposed to light from daylight to 10 a. m. and from 2 p. m. to 

 darkness. Planted June 14, placed in dark house June 16, up June 19. 

 First blossoms appeared September 6 on test plants and September 

 15 on controls. See Plate 69, A. Average height of test plants 39 to 40 

 inches and that of controls 47 to 48 inches. In all of the above-described 

 tests with soybeans observations were made on from 20 to 25 individuals. 



TOBACCO (NICOTIANA TABACUM AND N. RUSTICA L.) 



(a) NicoTiANA TABACUM ; ^ MARYLAND Mammoth, giant type: 



(i) Exposed to light from 10 a. m. to 3 p. m. Observations on 14 

 test plants and 10 controls. Planted March 6, transplanted to 6-inch 

 pots May 10, and placed in dark house May 14. First blossoms appeared 

 July 8 to August 14 on test plants and in last week of October on controls. 

 Average height of test plants 14 to 16 inches and that of controls 3 to 

 5 inches. 



(2) Exposed to light from 9 a. m. to 4 p. m. Observations on 7 test 

 plants and 10 controls. Planted March 6, transplanted to 6-inch pots 

 May 10, and placed in dark house May 14. First blossoms appeared 

 July 18 to August I on test plants and in last week of October on controls. 



1 Horticultural variety. 



