. Decomposition of green manures at different stages of growth ... Green manuring. [from old catalog]. 148 Bulletin 406 that no nitrification has occurred, for evidence is given in table 2 and in the curves for humus (figures 27, 28, and 29) that some decomposition has taken place. It is probable that these two exceptions are due to the fact that nitrification has not become siifficiently pronounced to respond to the tests. Moreover, the nitrogen rendered available has perhaps been converted into some other form by the organisms of decomposition. This idea is supported by Gainey (1914), who sh
. Decomposition of green manures at different stages of growth ... Green manuring. [from old catalog]. 148 Bulletin 406 that no nitrification has occurred, for evidence is given in table 2 and in the curves for humus (figures 27, 28, and 29) that some decomposition has taken place. It is probable that these two exceptions are due to the fact that nitrification has not become siifficiently pronounced to respond to the tests. Moreover, the nitrogen rendered available has perhaps been converted into some other form by the organisms of decomposition. This idea is supported by Gainey (1914), who shows that in using the. -Maturity of green manure- Fig. 29. SERIES 1918, effect of maturity of green manure on percentage of DRY matter humified AT THE END OF FIVE MONTHS The green material at each stage came from equal soil areas, but were, of caarss, different in amounts (Data given in table 7) acciunulation of nitrates as a measure of the nitrifying power, one is confronted with the difficulty that the nitrates are sometimes used as a source of nitrogen by the saprophytic organisms of the soil. In the curve for buclcwheat in figure 30, the youngest material shows the least amount of nitrification as compared with the later stages of-growth. In figure 31, the most succulent period, compared with the medium or jB-stage, of maturity, indicates the same result. A physical examination of the soil itself, at the time of sampling for analysis, revealed that the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Martin, Thomas Lysons, 1885- [from old catalog]. [Ithaca]
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherithac, bookyear1921
