Douglas-Fir Bark Tannin Decomposition in Two Forest Soils (Classic Reprint)

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Excerpt from Douglas-Fir Bark Tannin Decomposition in Two Forest SoilsBacterial population was also affected by the treatments, but not so strikingly as were molds. Incubation markedly increased numbers of bacteria, especially in the Preacher soil, and incubation plus tannin caused a further doubling. Streptomyces spp. Were eliminated in incubated Preacher soil and also, to a large extent, in the incubated tannin-treated soil. In Astoria soil, on the other hand, incubation increased percentage of Streptomyces and incubation of tannin-treated soil resulted in an even greater preponderance of these higher bacteria.It should be noted that bark carries a high microbial population (bollen 1969) which undoubtedly decomposes some of the tannin before it can be leached into the soil. Thus, in a bark mulch, the same initial level of tannin as that used in our experiment would likely affect soil microbial activities less than did the extracted tannin concentration we used.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.