. Some effects of a harmful organic soil constituent . is it will be seen that the harmful substance produced its greatesteffect in general along the periphery of the triangle, except perhapsalong the phosphate-nitrogen line. In the interior of the triangle,where the greater growth occurred under more normal conditions,the depression caused by the substance was not so marked, and this CONCENTRATIONS OF CULTURE SOLUTIONS, EXPERIMENT I. 31 seems to be especially true in the region nearer to the nitrate end,in which, as already pointed out, the greater growth occurred in thecultures where the dih
. Some effects of a harmful organic soil constituent . is it will be seen that the harmful substance produced its greatesteffect in general along the periphery of the triangle, except perhapsalong the phosphate-nitrogen line. In the interior of the triangle,where the greater growth occurred under more normal conditions,the depression caused by the substance was not so marked, and this CONCENTRATIONS OF CULTURE SOLUTIONS, EXPERIMENT I. 31 seems to be especially true in the region nearer to the nitrate end,in which, as already pointed out, the greater growth occurred in thecultures where the dihydroxystearic acid was present. A moredetailed discussion, as well as grouping of these green weights andtheir correlation with the concentrations of the solutions and amountsof materials removed, will be given later. TOTAL CONCENTRATIONS IN P2O5, NH3, AND K2O FOUND IN THEVARIOUS CULTURE SOLUTIONS OF EXPERIMENT I. As has already been stated, the solutions were anal3^zed everythird day for the three component fertilizer parts, phosphate, nitrate, KoO NH: Fig. 5.—Showing the average ooncentration of the solution, in parts per million of r206 +NH3 +K2O, aftergrowth of wheat plants, without dihydroxj-stearic acid—Experiment I. and potassium, expressed as P2O5, NH3, and KjO- The originalconcentration in these elements was in the sum total 80 parts permillion. After analysis, the sum total of the three component partswas again calculated, and the average concentration of these threeelements was ascertained for the eight periods. These average con-centrations will be found in the diagram in figure 5, which gives theconcentration of the solution when no dihydroxystearic acid was 32 EFFECTS OF A HARMFUL SOIL CONSTITUENT. present, and in figure 6, which gives the concentration of the solu-tion when dihydroxystearic acid was present. It will be seen thatin practically all cases where dihydroxystearic acid was present theconcentration of the solution was not reduced as much as in
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