XVI Journal of Agricultural Research voi. xvrn 



Page 



Plate 73. A. — Phaseolus vulgaris from Peru and Bolivia exposed to light 

 from 9 a. m. to 4 p. m. B. — Control series of Phaseolus left out of doors 

 during the experiment 606 



Plate 74. A. — Mikania scandens L- exposed to light from 9 a. m to 4 p. m. 



daily. B. — Control plants of Mikania left out of doors during the test 606 



Plate 75. A. — Ragweed. Plants on left exposed to light from 9 a. m. to 4 

 p. m. daily. Plants on right left out of doors as controls. B. — Radish. 

 Plants in box on left exposed to light from 9 a. m. to 4 p. m. daily 606 



Plate 76. A. — Portion of stem of Maryland Mammoth tobacco plant, showing 

 the sharp delimitation of dying back of the original growth as controlled by 

 the appearance of new shoots. B. — Triangular type of shade with cheese- 

 cloth covering, used in the 1916 test with soybeans 606 



Plate 77. A. — Shade cloth, 6 by 6 mesh. B. — Shade cloth, 8 by 10 mesh. 

 C. — Shade cloth, 12 by 12 mesh. D. — Shade cloth, 12 by 20 mesh. E. — 

 Standard cheesecloth used in 1916 experiments 606 



Plate 78. A. — Soybeans growing in box set in soil (covers removed), shaded 

 with 12 by 12 mesh netting. B. — Series of consecutive plantings of soy- 

 beans in the field during the summer 606 



Plate 79. A. — Soybeans growing in four boxes set in the soil and provided 

 with removable covers. B. — Carrots. Plants in box on left exposed to 

 light from 9 a. m. to4p. m. daily 606 



TEXT FIGURES 



Notes on the Composition of the Sorghum Plant 



Fig. I . Development of the proximate and mineral constituents of the sorghum 



plant in the later stages of growth 4 



2 . Total weight of proximate constituents in a single sorghum plant dur- 



ing the later stages of growth 6 



3. Development of the proximate and mineral constituents of the leaves 



of sorghum 7 



4. Total weight of proximate constituents in the leaves of a single sorghum 



plant 7 



5. Development of the proximate and mineral constituents of the seed 



heads of sorghum 8 



6. Total weight of proximate constituents in the seed head of a single sor- 



ghum plant 9 



7 . Development of the proximate and mineral constituents of the bagasse 



of sorghum 10 



8. Total weight of proximate constituents in the bagasse of a single sor- 



ghum plant II 



9. Development of the percentages of dry matter in the various parts of 



the sorghum plant 12 



10. Development of the crude protein in the various parts of the sorghum 



plant 13 



1 1 . Development of the ether extract in the various parts of the sorghum 



plant 14 



12. Development of the crude fiber in the various parts of the sorghum 



plant 15 



13. Development of the nitrogen -free extract in the various parts of the 



sorghum plant 16 



14. Development of the ash content in the various parts of the sorghum 



jDlant 17 



