1920 
588 The Philippine Journal of Science 
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 
H, 1917. 
Culture No. 
Osmotic 
concen- 
tration. 
Water absorption. 
Water requirement. 
A. 
B. 
Average. 
Tops. 
Roots. 
Atm. 
cc. 
CC. 
cc. 
cc. per g. 
cc. per g. 
7.0 
205 
233 
219 
348 
973 
5.5 
304 
289 
297 
417 
1, 076 
4.5 
350 
341 
346 
450 
1, 142 
T7R1C1 
3.5 
405 
381 
393 
514 
1, 394 
2.5 
475 
406 
441 
602 
1.664 
1.6 
488 
487 
488 
697 
1,863 
1.0 
404 
364 
384 
538 
1. 770 
0.5 
423 
358 
391 
643 
1,700 
7.0 
228 
215 
222 
314 
1, 200 
5.5 
261 
256 
259 
343 
1,289 
4.5 
314 
306 
310 
391 
1, 336 
T1R1C1 
3.5 
364 
339 
352 
442 
1, 449 
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 
379 
388 
620 
1,856 
7.0 
250 
242 
246 
320 
904 
5.5 
315 
. 306 
311 
379 
1,016 
4.6 
390 
381 
386 
427 
1,218 
T2R4C2 
3.5 
489 
447 
468 
454 
1,296 
2.5 
577 
530 
554 
496 
1,518 
1.6 
660 
632 
646 
560 
1,732 
1.0 
638 
597 
618 
652 
2,095 
0.5 
620 
682 
651 
703 
2, 170 
7.0 
224 
223 
224 
328 
1,000 
5.5 
316 
305 
Sll 
396 
1, 156 
4.5 
402 
370 
386 
412 
1,225 
R6C2* 
3.5 
469 
424 
447 
459 
1,375 
2.5 
555 
536 
546 
485 
1, 480 
1.6 
617 
611 
614 
533 
1, 682 
1.0 
622 
596 
609 
610 
2, 003 
0.5 
655 
620 
638 
715 
2, 337 
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 
