950 PROCEEDINGS OF SECTION G. 
Let us assume that the phosphoric acid had three times the 
influence that the nitrogen had; then the total influence would 
be represented as follows :— 
Plot 8 Plot 7. Plotil. Plotz14. 
Influence of nitrogen in the proportions of 633 598 492 418 
Influence of phosphoric acid (3 times the 
soil phosphoric acid + 14 time the : 
subsoil phosphoric acid) ............0600+ 432 438 450 j; 4382 
Motaline pieces ee ete. 1,065 1,036 942 850 
The figures of these totals are curved in the following diagram, 
upper curve, continuous lines. The lowest curve—dot and dash 
lines—represents the production of beet-root in tons per acre. 
There is a general parallelism between the two lines; but the 
parallelism does not continue into detail, for we see that Plot 11 
yielded somewhat better than we should have anticipated from 
considerations of the nitrogen and phosphoric acid only. It will 
be observed that this plot contained much more lime than the 
others, and this lime had no doubt a favourable influence on the 
texture of the soil. If, as in the case of the other constituents, 
we assign half the value to the subsoil lime that we do to the soil 
lime, then we get the following figures as representing the total 
soil and subsoil lime values for the four plots respectively :— 
21 622 25,810 39,655 23,695 
