. Alcuni effetti di un costituente del suolo organico nocivo . 45 55 0 ; 54 46 0 44 56 0 85 15 62 0 60 40 0 1 64 36 0 54 46 0 60 40 0 61 39 63 0 70 30 0 i 80 20 0 i 56 44 0 70 30 0 81 19 64 0 80 20 0 1 90 10 0 66 34 0 80 20 0 81 19 65 0 90 10 0 93 7 0 80 20 0 88 12 0 92 8 66 0 100 0 0 100 0 100 0 0 100 0 0 100 0 44156°^Bull. 70-10- 34 EFFETTI DI UN COSTITUENTE NOCIVO DEL SUOLO. Si può dire che in tutti i casi, sia con che senza acido diidrossi-stearico, il rapporto nella soluzione finale non è mai stato lo stesso dal rapporto originario. La quantità di cambiamento, tuttavia, wliich ha avuto luogo era marcatamente differente

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. Some effects of a harmful organic soil constituent . 45 55 0 ; 54 46 0 44 56 0 85 15 62 0 60 40 0 1 64 36 0 54 46 0 60 40 0 61 39 63 0 70 30 0 i 80 20 0 I 56 44 0 70 30 0 81 19 64 0 80 20 0 1 90 10 0 66 34 0 80 20 0 81 19 65 0 90 10 0 93 7 0 80 20 0 88 12 0 92 8 66 0 100 0 0 100 0 0 100 0 0 100 0 0 100 0 44156°^Bull. 70—10- 34 EFFECTS OF A HARMFUL SOIL CONSTITUENT. It might be said that in all cases, either with or without dihydroxy-stearic acid, the ratio in the final solution was never the same asthe original ratio. The amount of change, however, wliich had takenplace was markedly different in the different solutions and dependedlargely upon what the original ratio was. In order to show tliis changein ratio of the fertilizer ingredients, the triangular diagram is ofthe greatest service, for without this it would be impossible to getan intelhgent idea of what had occurred in the solution. In thediagram, figure 7, are shown the original ratios of the fertilizerconstituents, the ratios left in these solutions as found by anal^sis, 0s. K^O NH. Fig. 7.—Showing the ratios of P2O5, NH3, and KeO in the original solutions, those in the solutions aftergrowth, and those of the loss from the culture solutions, without dihydroxystearic acid—Experiment I. and the corresponding ratio of the lost material. It may be mathe-matically shown that these three points lie upon a straight line andthis is the case in the diagram. Reference should again be made to the fact that every pointwithin the diagram represents a ratio of the three fertilizer ingre-dients. In constructing this diagram, the ratio of the originalsolution is readily located and is indicated by a black dot. Theratio of the P2O5, NH3, and K2O left in the solution after growthas determined bv anah^sis is then located in the proper place in thediagram according to the principle explained on pages 18-19 and is RATIOS OF P.jO:„ NH;., AND K^O, EXPERIMENT I. 35 indicated by a small circle. Similarh the ratio corres

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• bookpublisherwashi
• bookyear1910