518 Philippine Journal-of Science 1920 
TABLE 15.—Relative yields of tops, roots, and entire plants for selected 
solutions of 4-salt type A, 4-salt type B, and 3-salt type I, final com- 
parative series. 
[Data are for six plants, being averages from four cultures of six plants each. ] 
Total concentration. | Dry yield. 
| 
Solution No. Pr aneee ; 
age ss per posing Tops. Roots. pe 
AU ig Bin all Bs Gea gies aetlipe ekeetoyiin eee au 0.0016 0.08 a 1.00 21.00 81.00 
(0.169¢.) | (0.079¢.) | (0.996 2.) 
ATVROS? SS ts oe 0.0008 0.04 0.94 1.05 0.98 
WATERSS Ass a 0. 0008 0.04 0. 93 0. 94 0,98 
Te ae a 0.0008 0.04 0.83 1.00 0. 88 
Pa 92 9 Hi SR ane cE 0.0016 0.08 rhe 5 Se pees 1.02 0.88 
PORE oo Se Se kk 0.0016 0.08 0.72 0.94 0.79 
TPR EG) Soo ese ee 0. 0016 0.08 0.97 1.02 0.99 
ig Ula 9 Siar eee Sees ues ere esata 0. 0008 0. 04 0.87 1.04 0, 98 
BT2R1S2 ._______ Se es 0.0016 0.08 0.85 1.08 0.91 
BTIRIS3 Sos oe es Se 0.0008 0.04 0. 84 1.02 0.90 
PTBRISH (isessut per es et 0.0016 0. 08 0.81 1.00 0. 87 
BUSRES) oo ese 0. 0008 0.04 0.84 1.04 0.87 
PROT ee 0. 0022 0.10 0.44 0.89 0.59 
TRUSS ee 0. 0022 0.10 0.40 0. 90 0.57 
| TRASIP. ...........----..+----.------ 0. 0022 0.10 0. 40 0.87 0, 55 
| TRSS2e_ = 0. 0022 0.10 0.44 0.94 0.60 
IR5S2¢_ Vek 0.0382 1.75 0.47 0.92 0. 62 
a All values are expressed in terms of the corresponding one for solution AT1R2S1 and 
the actual value for this solution is given in parentheses beneath the relative value 1.00. 
> Increment one-seventh. 
¢ Increment of one-tenth osmotic proportions. 
Although the data in Table 15 are derived from twenty-four 
plants grown simultaneously in four cultures of six plants each, 
as has been stated, and although it may be assumed that the 
aérial complex of conditions was practically the same for all, yet 
it seems necessary to disregard all minor differences brought out 
in the table. With this consideration in view, we may allow 4 
plus or minus variation of 0.05 as negligible, so that 0.95 in the 
table becomes equivalent to all values from 0.95 to 1.05, in- 
clusive. In other words, the values from 0.95 to 1.05 may be 
considered as practically alike, all lying within the best grouP- 
On the basis of this agreement it is seen that just two solutions 
agree in belonging to the best group for all three criteria (yields 
of tops, roots, and entire plants), and that these two solutions 
are ATIR2S1 and BT2R1S1. It must be remarked, however, 
that the second of these solutions, and all of the B type in this 
series, produced the characteristic form of leaf’ injury note 
above, so that this solution is not to be regarded as nearly 8° 
