Excerpt from Instructions for Making Plant Survival Surveys in Region 8 The intensity of field work will depend upon the degree of accuracy required, the size of the planting, and the information desired, as well as upon the amount of time and money available. The initial survey will cover not less than ten samples of 25 individuals each well distributed over the planting area. The final count, if needed, should cover the area in more detail, the number of samples depending upon the accuracy required. The final standard error of the mean must not exceed i:5% for these surveys. Plantings containing 1000 or more individuals will be treated statistically, those with less than 1000 individuals will have the actua survival percentage determined. These small plantings should be isolated and not directly related to any other planting. Survival surveys will be made following the critical periods and before the leaves have fallen. One and often two survival surveys will be necessary annually. 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.