12 



Journal of Agricultural Research 



Vol. X. No. I 



In order to define better the conditions under which the plants were 

 grown, soil samples for moisture determination were taken for each foot 

 to a depth of 6 feet. This was done either a few days before or after the 

 experimental work with the leaves. The results of these moisture 

 determinations, together with the wilting coefficient and moisture 

 equivalent for the several plots, are shown in Table I. 



Table I. — Moisture content of the soil at the time the leaf samples were taken in 1914, 19x5, 

 and 1916, at Garden City, Kans. 



Com-milo-kafir plot: 



July 2, 1914 



July 10, 1914 



July 21, 1914 



July 29, 1914 



Wilting coefficient . . 



Moisture equivalent. 



July 29, 1914 



August 12, 1914. .. . 



August 22, 1914. .. . 



July 12, 1915 



August 6, 1915 



. Wilting coefficient . . 



Moisture equivalent. 

 Com plot: 



July 20, 1916 



August I, 1916 



August 10, 1916. .. . 



Wilting coefficient . . 



Moisture equivalent. 

 Milo plot: 



July 20, 1916 



August I, 1916 



August 10, 1916. .. . 



Wilting coefficient . . 



Moisture equivalent. 

 Kafir plot: 



August 10, 1916. .. . 



Wilting coefficient . . 



Moisture equivalent 



July 26, 1916 



Wilting coefficient . . 



Moisture equivalent 



Percentage of moisture, wilting coefficient, and moisture equivalent 

 to a depth of — 



: foot. 



14. 6 



11. 8 

 10. 6 



8.7 



12. y 



23-4 

 10.3 

 10. 2 



9-5 

 16. 2 

 14. 2 



13-3 

 24.4 



10. o 

 7-3 

 7-5 



12.3 

 22. 6 



11. I 



8.3 

 8.0 



12. 2 

 22. 4 



7.0 

 12.7 



23-3 

 10.8 

 12. 7 

 23-4 



2 feet. 3 feet. 4 feet. 5 feet. 6 feet, 



20. 2 

 17. I 



13- 1 



14-5 

 26.7 



15-7 

 14.9 

 14.9 

 20.8 



IS- 2 

 14. 1 



25-9 



14.7 

 II. 8 



II- 5 

 15-9 

 29-3 



15-4 



9-9 



II. 8 



13-4 

 24. 6 



II. o 



12.3 

 22.5 

 16. 9 



14-5 

 26. 7 



21. 2 

 19-5 

 14-5 

 13-5 

 14-5 

 26. J 

 16. 2 

 14. 1 

 14. I 

 20. 2 



IS- 4 

 14.9 



27-5 



19. o 

 14. o 



12. S 

 12.4 



23-0 



19. 6 

 14. 6 

 14. I 



15- 1 

 27.8 



II. 7 



15-3 

 28.2 



19-3 



14-5 

 26. 7 



22.8 

 23.6 

 19-4 

 16.8 

 16.3 

 30. o 

 18.4 

 IS- 2 

 14.4 

 17.8 

 16. o 

 13.6 



25-1 



21. 9 



18. 1 



14. 6 

 15.0 

 27.7 



22. 2 

 14.9 

 13.6 



H-3 

 26.3 



13. 6 



13-9 

 25.6 

 21. 9 

 16.3 

 30.0 



22. I 

 24. 6 

 22.8 



21. 4 

 17. 1 



31-5 

 19.8 

 17.7 



IS- 5 

 19. o 

 16. I 



13-4 

 24.6 



23.6 

 21. 4 



18.7 

 16. 3 

 30.1 



24. 1 

 20.8 

 18.6 



15-4 

 28.3 



21. 1 

 16. 9 



31-3 



22. I 

 17. 1 

 31-5 



21.8 

 21. 4 

 21. 7 

 21. o 

 16. 1 

 29.6 



20. I 

 19. 6 

 18.8 

 iS-S 

 IS- 4 

 II. 9 



21. 9 



24. 2 



22. o 

 20.8 

 16. 4 

 30.2 



24.8 

 24. o 



21. 4 



15-6 



28.6 



22. 6 

 17.8 

 32.8 

 21. 2 

 16. 1 

 29. 6 



EVAPORATION 



Hourly evaporation was determined by I^ivingston's porous-cup 

 atmometers with a coefficient of 74. The atmometers were placed 2 feet 

 from the ground and connected with burettes so that readings could be 

 made to o.i c. c. These atmometers were renewed every three weeks 

 during the periods of the experiments. The evaporation obtained in this 

 manner for each 2-hour period is shown in Table II. 



