Download or read book Root Dipping of Conifer Seedlings Shows Little Benefit in the Northern Rocky Mountains (Classic Reprint) written by John P. Sloan and published by Forgotten Books. This book was released on 2017-11-10 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Root Dipping of Conifer Seedlings Shows Little Benefit in the Northern Rocky Mountains We tested the effects of vermiculite slurry on lodge pole pine seedlings in growth chambers. All roots were trimmed to 8 inches. The composition of the slurry was a ratio of number 4 grade agricultural ver miculite to water. The mixture was run through a pump to grind up the vermiculite and form a muddy suspension. Treated seedlings were dipped before being potted in 9-inch pots. Control seedlings were not dipped. Pots were randomly arranged in three growth chambers. Conditions were set at 16 hours light period daily, with temperatures of 75 °f during light and 60 °f during dark. At the end of 1 month, the seedlings were carefully removed from the pots, soil was washed from their roots, and the light-colored new roots were counted and measured. Growth Chamber Experiment 1 -the objective of our first experiment in the growth chamber was to determine the effects of a vermiculite slurry root dip on lodgepole pine root and shoot growth. It lasted 31 days in February and March of 1984. The sample size was 30 seedlings: 15 dipped and 15 controls. The potting medium was a mixture by volume of sandy loam soil, peat moss, and vermiculite. The pots were watered to saturation twice a week. Growth Chamber Experiment 2 - The objective of the second experiment was to determine the effects of the same root-dip substance on the shoot and root growth of lodgepole pine seedlings in four different soils. It lasted 30 days in March and April of 1985. The sample size was 48 seedlings. Six replications of eight seedlings were divided between three growth chambers, two replications in each chamber. Each replication consisted of a dipped and an undipped tree, planted in soils of four different origins: limestone forest soil, granitic forest soil, basaltic forest soil, and peat-vermiculite-sandy loam (see Growth Chamber Experiment Pots were. Randomly arranged within the growth chamber for each replication. Pots were watered to saturation once each week. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.