16,5 Espino: Salt Requn'ements of Young Rice Plants 499 
accompanying high top yields and, conversely, it appears that 
the young rice plants generally show parallel, rather than op- 
posite, effects upon top and root production. 
Turning to the higher total concentration (0.0038 gram- 
molecule per liter, or 0.2 atmosphere), only two sets of salt pro- 
portions are indicated as of the high group of top yields (fig. 6) in 
the forward left region of the lowest 'triangle (the high designa- 
tion given to solution T1R4S2 appears to be erratic in some way) . 
On this top diagram the low region comprises six sets of salt 
proportions, lying at the forward right apices of the second. 
KH, PO, 
Fig. 7. Root-yield values for the thirty-five different sets of salt proportions, with high- 
medium total concentration. 
