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Bibliographic Details
Main Author:	Harrison, John Darley Braithwaite (Author)
Format:	Book
Language:	English
Published:	Washington, D.C. FAO 1950
Series:	FAO forestry and forest products studies 1
Subjects:	Inventaires forestiers Forest surveys
Links:	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014598661&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Physical Description:	VIII, 88 S.

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MARC


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Record in the Search Index

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adam_text	FAG FORESTRY AND FOREST PRODUCTS STUDIES No 1 Planning a National Forest Inventory This study was undertaken on instructions from the Conference of FAO, as part of the work of the For- estry and Forest Products Division It represents the views of the Division on the subjects dealt with These views have been formulated after extensive consultation with governmental and commercial authorities, whose assistance is gratefully acknowl- edged The study was written by JDB HARRISON Chief of the Economics Section Dixnsion of Forestry and Forest Products Fachbibliothek Zellstoff und Papier TU Darmstadt 59610007 Washington, DC,USA September 19r0 FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Contents Preface ______________________________________________________ vii I The Forest Inventory_________________________________________ 1 Factors Influencing Survey Costs_________________________ 4 The Urgent Need for Forest Inventories________________ 7 Definition of a Forest Inventory_________________________ 9 Forest Areas _____________________________________ 9 Forest Ownership ____________________________________ 10 Volumes of Standing Timber_________________________ 10 Growth ______________________________________________ 11 Drain _____________ ____________ ____________________ 11 Periodicity _________________________________________ 12 II Planning ___________________________________________________ 14 Allocation of Functions and Responsibilities_________ 15 Functions of Government_________________________________ 16 Responsibilities of Technical Authorities____________ 17 III Forest Classification______ 21 Classification Based on Present Conditions 23 Classification of Nonproductive Forests______________ 25 Nonforested Areas ___________________________________ 25 Classification Based on Historical Factors______________ 25 Ownership Classes ______________________________________ 26 IV Maps and Mapping_______________________________________ 27 Preparation of New Maps 28 Map Scales ____________________________________________ 30 Map Features _______________________________________ 31 Forest Maps __________________________________________ 32 Care and Filing of Maps_________________________________ 32 Map Reproduction _______________________________________ 33 iii V Aerial Surveys______________________________________________ Aerial Sketching _______________________________________ Aerial Photography and Photogrammetry------------------- Types of Aerial Photographs_____________________________ Characteristics of Photographs__________________________ Scale ________________________________________________ Focal Length of Lens__________________________________ Films and Filters_____________________________________ Size of Pictures__________ ___________________________ Contact Prints and Enlargements_______________________ Aerial Surveying _______________________________________ Use of Aerial Photographs_______________________________ Base Maps ____________________________________________ Mosaics ______________________________________________ Interpretation of Forestry Information________________ Forest Mapping _______________________________________ Tree Heights __________ ______________________________ Crown Widths _____________ Density ______________________________________________ Tree Species __________ - ---------------------------- Volumes ______________________________________________ Site Classification __________________________________ Use of Photographs in the Field_______________________ Instruments Used in Forestry Interpretation------------- Specifications for Aerial Surveys______ 1_______________ Costs of Aerial Surveys_________________________________ Selected References: Aerial Surveys_____________________ VI Ground Surveys ____________________________________________ Sampling _______________________________________________ Stratification _______________________________________ Systematic Sampling ______ ___________________________ Random Sampling ___________________________________ - Systematic vs Random Sampling in Undeveloped Forests _______________________________ Selective Sampling ___________________________________ iv 31 31 35 37 38 38 39 41 41 42 42 45 4f 46 47 48 48 49 49 50 50 51 51 52 53 54 56 58 58 60 61 63 65 66 Principal Measurements ___________________________ 67 Measurement of Areas__________________________ 67 Measurement of Trees____________________________ 68 Units of Measurement_____________________________ 70 Measurement of Growth_________________________ 71 Measurement of Drain____________________________ 73 Supplementary Measurements and Observations________ 74 Soil Conditions ________________________________ 71 Minor Vegetation _______________________________ 75 Natural Reproduction ____________________________ 75 Treatment Required ______________________________ 75 Topography ______________________________________ 76 Selected References: Ground Surveys _______________ 76 VII Field Work, Compilation, and Reports __________ 79 Field Records _____________________________________ 81 Compilation ______________________________________ 82 The Final Report__________________________________ 83 Appendix A Equivalents ---------------------------------- 65 Appendix B Definitions ---------------------------------- 86
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format	Book
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series	FAO forestry and forest products studies
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spellingShingle	Harrison, John Darley Braithwaite Planning a national forest inventory FAO forestry and forest products studies Inventaires forestiers Forest surveys
title	Planning a national forest inventory
title_alt	National forest inventory
title_auth	Planning a national forest inventory
title_exact_search	Planning a national forest inventory
title_full	Planning a national forest inventory The study was written by J. D. B. Harrison
title_fullStr	Planning a national forest inventory The study was written by J. D. B. Harrison
title_full_unstemmed	Planning a national forest inventory The study was written by J. D. B. Harrison
title_short	Planning a national forest inventory
title_sort	planning a national forest inventory
topic	Inventaires forestiers Forest surveys
topic_facet	Inventaires forestiers Forest surveys
url	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014598661&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
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