16, 6 
Espino: Salt Requirements of Young Rice Plants 511 
proportions and the four total concentrations here dealt with did 
not differ significantly in their influence upon the ability of the 
plant tops to retain water. Calculating the water content as 
percentage of the corresponding green-weight value the result 
shows that the total range of these values is only from 79 to 87.5 
per cent, and most of the values lie between 83 and 86. It may 
be said that these tops were sensibly equally succulent for all 
cultures, irrespective of the total concentration or of the salt 
proportions. It is also clear that these tops were uniformly re- 
Table 13. — Water absorption (cubic centimeters per six plants) during 
the culture period, for series H, 16, 19, and 20, beginning June 19. 
Solution No. 
1 
Total concen- 
tration 0. 0008 
gram-molecule 
per liter, orO. 04 
atmosphere 
(series 14) . 
Total concen- 
tration 0. 0016 
gram-molecule 
per liter, or 
0.08 atmos- 
phere (series 
16). 
Total concen- 
tration 0. 0038 
gram-molecule 
per liter, or 0.2 
atmosphere 
(series 19). 
Total concen- 
tration 0. 0077 
gram-molecule 
per liter, or 0. 4 
atmosphere 
(series 20). 
cc. 
cc. 
cc. 
cc. 
TlRISl 
188 
H228 
H197 
H168 
S2 
186 
H196 
168 
H154 
S3 
185 
188 
165 
137 
S4 
174 
187 
157 
127 
S5 
156 L 
163 L 
142 L 
124 
R2S1 
190 
H205 
H177 
143 
S2 
H206 
188 
164 
H163 
S3 
H194 
183 
170 
134 
S4 
H198 
162 L 
160 
129 
R3S1 
192 
190 
173 
H176 
S2 
H204 
189 
H184 
H155 
S3 
H206 
170 
H191 
134 
R4S1 
192 
187 
H204 
H163 
S2 
H206 
178 
H180 
H150 
R5S1 
169 L 
183 
154 
136 
T2R1S1 
181 
189 
H.184 
142 
S2 
145 L 
190 
155 
139 
S3 
153 L 
166 
170 
131 
S4 
146 L 
161 L 
120L 
123 
R2S1 
167 L 
H191 
173 
128 
S2 .1 
H199 
H217 
H194 
142 
S3 
160 L 
143 L 
142 L 
123 
R3S1 
H201 
174 
163 
H146 
S2 
186 
183 
168 
138 
R4S1 
175 
176 
169 
113 L 
T3R1S1 
176 
H193 
138 L 
134 
S2 
181 
166 
146 
136 
S3 
160 L 
162 L 
128 L 
91 L 
R2S1 
H194 
H194 
152) 
135 
S2 
176 
163 L 
144 L 
120 L 
R3S1 
H210 
190 
160 
119 L 
T4R1S1 
173 
160 L 
161 
115 L 
S2 
153 L 
146 L 
108 L 
109 L 
R2S1 
191 
162 L 
154 
105 L 
T6R1S1.... 
H199 
167 
126 L 
109 L 
