8 
Nebraska Agricultural Exp. Station, Research Bui. 6. 
TABLE PAGE 
33. Seasonal variation in water requirement of corn as 
related to climatic conditions in different years 
expressed in free-water-surface evaporation. 1910- 
1914 109 
34. Mean weather factors (7 a. m. to 6 p. m.) during 
July and August for five years. 1910-1914 109 
35. Effect of seasonal climatic differences upon water 
requirements of corn exposed under natural con- 
ditions, as compared with effect of controlled 
climatic differences under greenhouse conditions 110 
36. Relation of water used by plants to atmospheric 
humidity. 1911. Hogue's Yellow Dent corn used. 
Grown in potometers 16"x36". Harvested at 
silking stage 112 
37. Relation of water used by plants to atmospheric 
humidity. 1912. Hogue's Yellow Dent corn used. 
Grown in potometers 16"x36". Harvested at 
silking stage 112 
38. Relation of water used by plants to atmospheric 
humidity. 1912. Pop corn used. Grown in 4- 
gallon potometers. Harvested at silking stage 113 
39. Relation of water used by corn plants to atmos- 
pheric humidity. Average of three tests in 1911 
and 1912 113 
40. Effect of previous condition of growth on tran- 
spiration. 1912. Pop corn used. Grown in 4-gallon 
potometers 114 
41. Summary of plant temperatures showing the effect 
of transpiration upon leaf temperature. 1913 115 
42. Summary of plant temperature records in the corn- 
field. 1912. All temperatures were taken in the 
shade 116 
43. Summary showing the temperature of different parts 
of the growing corn plant. 1913 116 
44. Weekly summary of evaporation from free water 
surfaces 36 square inches in area at six elevations 
in a cornfield. 1912 120 
45. Weekly summary of evaporation from free water 
surfaces 36 square inches in area at five elevations 
in a cornfield. 1913 121 
46. Weekly summary of evaporation from free water 
surfaces 36 square inches in area at five elevations 
in a cornfield. 1914 121 
