Download or read book Photo Stratification Improves Northwest Timber Volume Estimates written by Colin D. MacLean and published by . This book was released on 1972 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photo Stratification Improves Northwest Timber Volume Estimates Classic Reprint written by Colin D. Maclean and published by Forgotten Books. This book was released on 2018-08-19 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Photo Stratification Improves Northwest Timber Volume Estimates Although stratification may be by either type map or photo sampling, type mapping is not usually undertaken unless the type map itself is an inventory objective, since photo plots, when combined with field plots in a stratified sam pling design, do a better job of stratification at less cost. Although double sampling for stratification offers the potential for esti mating timber volumes more efficiently than a simple field plot sample, there is no guarantee of success. The inventory forester who wonders how well the method might work for him must be guided primarily by the experience of others who have used it. In particular, he will need to know whether double sampling will result in lower sampling errors than might be obtained by simple field sur veys of equal cost, and if so, how much of a reduction in sampling error he can expect. If he decides to adopt the method, he will need to decide how many strata to identify and what boundaries to give them. In addition, he will need to decide how to allocate the field samples among these strata. The theoretical basis for answering these questions can be found in Cochran Unfortunately, localized reports on the results of practical experience are harder to find. Although a number of inventory organizations in the United States and at least one in Canada use double sampling for stratification, only a few have published results and these are inconsistent (1, 2, 4, Additional reports on field experience with forest inventory applications of double sampling for stratification are needed, particularly for the Pacific Northwest where no such published data are available. To help fill this need. 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.

Download or read book Photo Stratification Improves Northwest Timber Volume Estimates written by Colin D. MacLean and published by . This book was released on 1972 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photo stratification improves northwest timber volume estimates written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service Research Paper PNW written by and published by . This book was released on 1973 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method of Estimating Log Weights written by Charles N. Mann and published by . This book was released on 1972 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Note written by and published by . This book was released on 1978 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Accomplishments written by and published by . This book was released on 1974 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1980 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annotated List of Publications of the Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog United States Public Documents written by United States. Superintendent of Documents and published by . This book was released on 1973 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.

Download or read book A Primer on Stand and Forest Inventory Designs written by H. Gyde Lund and published by . This book was released on 1989 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings Symposium IUFRO Subject Group S 6 05 written by International Union of Forestry Research Organizations and published by . This book was released on 1974 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report Pacific Northwest Forest and Range Experiment Station written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service General Technical Report PNW written by and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: