588 The Philippine Journal of Science 1920 
TABLE 16.—Water-absorption data for wheat; also, average amount of 
water absorbed for each gram of yield of tops and of roots (water 
requirement) ; for series IV, conducted from January 23 to February 
24, 1917. 
Z Water absorption. Water requirement. 
Osmotic 
Culture No. concen- 
bichioacaads woot 'B, |Average.| Tops. | Roots. 
Atm. ce. ce. ec. cc. perg.| ce. per g. 
7.0 205 233 219 848 973 
5.5 304 289 297 417 1, 076 
4.5 350 $41 346 450 1, 142 
3.5 405 381 393 514 1,394 
fe aera aE a 2.5 475 406 441 602 1, 664 
1.6 488 487 488 697 1, 863 
1.0 404 864 384 538 | 1, 770 
0.5 423 858 391 643 1, 700 
7.0 228 215 222 814 1, 200 
5.5 261 256 259 848 1, 289 
4.5 314 306 310 391 1,386 
3.5 364 339 352 442 1,449 | 
ke SS RE 2.5 405 394| ” 400 516 1, 606 
1.6 446 437 442 602 1, 700 
1.0 412 398 405 642 1, 966 
0.5 396 879 388 620 1, 856 
7.0 250 242 246 320 904 
5.5 $15 806 811 379 1, 016 
4.5 890 881 386 427 1,218 
Wee : 3.5 489 447 468 454 |. 1,296 
2.5 577 530 554 496 1,518 
16 660 632 646 560 1, 732 
1.0 638 597 618 652 2, 095 
0.5 620 682 651 708 2,170 
7.0 224 223 224 328 1, 000 
5.5 816 | 805 311 896 1, 156 
4.5 402 370 386 412 1,225 
BO eee 3.6 469 424 447 459 1,875 
At: eT 2.5 555 536 546 485. 1, 480 
rf 4a 617 611; ‘614 533 1, 682 
1.0 622 596 | 609 610 2, 008 
0.5 655 620 | 638 715 2, 387 
this injury was not apparent with these proportions with a 
concentration value of 1.60 atmospheres, for which injury was 
observed in series I. At any rate, these results indicate that 
magnesium injury is not to be expected with the lower concen- 
trations of this set of salt proportions, but that it is to be expected 
with higher concentrations. With the other four-salt mixture 
here tested (T7R1C1, having the highest content of potassium 
chloride of all the original eighty-four solutions) no magnesium 
