Oct 23,1916 Daily Transpiration during Normal Growth Period 
183 
Table XV. —Transpiration per square meter of plant surface during the 10-day period 
July y to i6 y iqi$ & 
Crop. 
Plant 
surface. 
Daily transpiration 
July 7-16. 
Hourly 
transpira¬ 
tion per 
square 
meter of 
plant 
surface 
during 
midday. 
Ratio of 
transpira¬ 
tion per 
square 
meter to 
evaporation 
per square 
meter. 
Actual. 
Per square 
meter of 
plant 
surface. 
Sq. meters. 
Kgm. 
Kgm . 
Gm. 
Wheat, Kubanka . 
I. 97 
2.05 
I. 04 
104 
0. 14 
Wheat, Galgalos .. 
i. 47 
2. 17 
I. 48 
148 
. 20 
Wheat, Washington Bluestem. 
2* 57 
2. 41 
* -94 
94 
• z 3 
Wheat, Turkestan. 
2.10 
2. 90 
1.38 
138 
. 19 
Wheat, Marquis. 
1. 78 
2. 26 
1. 27 
127 
. 17 
Wheat, Kubanka. 
2.16 
2. 46 
1. 14 
114 
. 16 
Wheat, Preston. 
3 - 7 ° 
2.86 
• 77 
77 
. 11 
Oat, Swedish Select . 
2. 82 
3 - 83 
1. 36 
136 
. 19 
Oat, Burt . 
i- 95 
3 - °3 
55 
i 55 
. 21 
Barley .. 
1. 74 
3-15 
1. 81 
181 
•25 
Rye..... 
1. 50 
2. 28 
1. 52 
x 5 2 
. 21 
Flax, North Dakota (C. I. 13). 
1. 49 
2. 52 
* 1. 69 
169 
•23 
Flax, North Dakota (C. I. 19). 
2* 73 
3 - 49 
1. 28 
128 
.18 
Flax, Smyrna. 
3 * 54 
3 - 34 
•94 
94 
•*3 
a Mean daily evaporation=7.3 kgm. per square meter. Hourly evaporation during midday 730 gm. per 
square meter. 
v 
Table XVI. —Transpiration per square meter of plant surface during the 10-day period 
July 2j to August 5, igis a 
Daily transpiration 
July 2 7-Aug. 5. 
Hourly 
transpira¬ 
tion per 
square 
meter of 
plant 
surface 
during 
midday. 
Ratio 
transpira¬ 
tion per 
square 
meter to 
evaporation 
per square 
meter. 
Crop. 
Plant 
surface. 
Actual. 
Per square 
meter of 
plant 
surface. 
Cowpea . . 
Sq. meters. 
2. 14 
Kgm. 
15 
Kgm. 
O. 54 
Gm. 
54 
. 08 
Millet, Kursk. 
2. 20 
I- 15 
• S 2 
52 
.08 
Sorghum. 
I. 09 
.84 
• 77 
77 
. 12 
Com. 
•97 
•58 
58 
.09 
Amaranthus.. 
1.71 
.90 
• 53 
53 
.09 
Sudan grass. k . 
2. 41 
I. 18 
•49 
49 
.08 
Alfalfa, E23. 
4. S 3 
2. 52 
•56 
.09 
Alfalfa, 162-98A1 . 
2.86 
2. 38 
.83 
83 
•13 
« Mean daily evaporation=6.2 kgm. per square meter. Hourly evaporation during midday=62o gm. 
per square meter. 
