Potassium to Growth in Plants. 
209 
systems were glistening, white, fibrous, and well branched. No observable 
difference could be detected between the plants growing in solution A and 
Tarle XXI. Effect of delayed additions of potassium on the growth of 
Blue stem Wheat plants in water culture. 
Nutritive solution 
No. of 
Total wei}. 
fit of plants. 
. Dry weight of 
Ratio of 
used. 
plants. 
Green. 
Dry. 
Tops. 
Roots. 
tops to 
roots. 
Grm. 
Grm. 
Grm. 
Grm. 
Solution A 
5 
5.3680 
0.7406 
0.5348 
0-2056 
5 
8.4450 
0.7299 
0-539 8 
0.190 1 
Mean 
1 
1-3813 
0.1470 
0.1075 
0.0396 
2.72 
Solution F 
5 
6.9050 
0.6613 
0.4907 
0.1706 
5 
8.6360 
o *7795 
0-6029 
0.1766 
Mean 
1 
1*5541 
0.1441 
0.1094 
0.0347 
3* T 5 
Solution F, less potas- 
5 
2.3820 
0.2826 
0.2218 
0-0608 
sium. 
Potassium added after 
5 
**5330 
6.2325 
0-1815 
0.0510 
3 days. 
5 
3*1650 
0.3602 
0.2702 
0.0900 
5 
1.2650 
0.2213 
0-1731 
0-0482 
Mean 
1 
0.4172 
0.0548 
0.0423 
0-0125 
3*38 
Solution F, less potas- 
5 
2-1270 
0.2721 
0-2160 
0-0561 
sium. 
Potassium added after 
5 
!*9944 
0.2752 
0.2031 
0-0721 
6 days. 
5 
0.9352 
0.1605 
0.1292 
0.0313 
5 3 
1-4222 
c.2014 
0-1583 
0.043 1 
Mean 
1 
0.3239 
0.0455 
0-0353 
0.0101 
3*49 
Solution F, less potas- 
5 
0.7210 
O 
6 
0.1408 
0.0297 
sium. 
Potassium added after 
5 
0.3632 
0.1017 
0.0793 
0.0224 
9 days. 
5 
0.7500 
0.1606 
o-i 270 
0.0336 
5 
0-4087 
0.1064 
0.0845 
0.0219 
Mean 
1 
0.1015 
0.0246 
0.0194 
0.0052 
3*73 
Solution F, less potas- 
5 1 
0.6591 
0.1411 
0*1133 
0.0278 
sium. 
Potassium added after 
5 
0.9050 
0.1510 
0-1146 
0.0364 
1 2 days. 
5 
0.4969 
0.1169 
0.0936 
0.0233 
5 
0.6559 
0.1516 
0.1220 
0.0296 
Mean 
1 
0*1358 
0.0280 
0-0222 
0.0059 
3.76 
Solution F, less potas- 
i 2 
0.1261 
0-0262 
0.0207 
0.0055 
3*76 
sium. 
1 In computing the mean, the data for these five plants were omitted, as an error was apparently 
made in taking the weight of either the tops or the roots. 
2 Mean of the data presented in Table XX. 
P 
