. Journal of agricultural research . Journal of Agricultural Research Vol. XVIII, No. 11 PLATE 73 A.—Phaseolus vulgaris from Peru and Bolivia exposed to light from 9 a. m. to 4p. m. Contained full-gro\\Ti seed pods when f)hotographed August 15, 1919. B.—Control series of Phaseolus left out of doors diuing the experiment. Showed noindications of flowering when photographed August °—20-—5 PLATE 74 A.—Mikania scandens L. exposed to light from g a. m. to 4 p. m. daily. Showedno indications of flowering when photographed August 15, 1919. B.—Control plants of Mikania left out of doors durin
. Journal of agricultural research . Journal of Agricultural Research Vol. XVIII, No. 11 PLATE 73 A.—Phaseolus vulgaris from Peru and Bolivia exposed to light from 9 a. m. to 4p. m. Contained full-gro\\Ti seed pods when f)hotographed August 15, 1919. B.—Control series of Phaseolus left out of doors diuing the experiment. Showed noindications of flowering when photographed August °—20-—5 PLATE 74 A.—Mikania scandens L. exposed to light from g a. m. to 4 p. m. daily. Showedno indications of flowering when photographed August 15, 1919. B.—Control plants of Mikania left out of doors during the test. Blossoming pro-fusely when photographed August 15. Effect of Length of Day on Plant Growth Plate 74.
Size: 1671px × 1495px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1913
