Author: Publisher:
ISBN:
Category : Forest surveys
Languages : en
Pages : 44
Book Description
Resource Inventory Notes
Author: Resource Inventory Notes
Author: Arid Land Resource Inventories
Author: National Resources Inventory Training Modules
Author: Publisher:
ISBN:
Category : Natural resources surveys
Languages : en
Pages : 254
Book Description
A Primer on Stand and Forest Inventory Designs
Author: H. Gyde LundPublisher:
ISBN:
Category : Forest surveys
Languages : en
Pages : 100
Book Description
1992 National Resources Inventory Environmental and Resource Assessment Symposium
Author: Soil Change Guide: Procedures for Soil Survey and Resource Inventory
Author: U.S. Department of AgriculturePublisher: Lulu.com
ISBN: 0359573665
Category : Reference
Languages : en
Pages : 272
Book Description
Many soil properties have changed and can change as a result of management, historical land use, or even natural factors, such as drought, interacting with land use. National soil survey databases currently include soil property information for the relatively static soil properties, such as texture, and also for properties affected by management, such as soil organic matter. The databases do not, however, distinguish the values of dynamic soil properties (e.g., organic matter, bulk density, infiltration rate) according to their land use, management system, ecological state, or plant community. ?Dynamic soil properties? as defined in this Guide are soil properties that change within the human time scale. Differences that may exist in these properties can affect the performance of the soil. Furthermore, some dynamic soil properties change very little in response to management and disturbances.
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 940
Book Description
A Training Program for Citizen Conservationists in Community Resources Inventory
Author: James Edward AshtonPublisher:
ISBN:
Category : Agricultural extension work
Languages : en
Pages : 136
Book Description
Sampling Theory for Forest Inventory
Author: Pieter G.de VriesPublisher: Springer Science & Business Media
ISBN: 3642715818
Category : Technology & Engineering
Languages : en
Pages : 408
Book Description
Forest inventory may be defined as the technique of collecting, evaluating and presenting specified information on forest areas. Because of the generally la~ge extent of forest areas, data are usually collected by sampling, i.e. by making observations on only part of the area of interest. As there are many different sampling methods (e.g. Appendix 1), a choice must first be made as to which method suits the given field and financial circumstances best. On completion of the sampling procedure, the numerous data collected have next to be condensed to manageable representative quantities. Finally, from these quantities, inferences about the situation in the entire forest area are made, preferably accompanied by an indication of their reliability. This book is intended for students who want to know the whepefope of the sampling techniques used in forest inventory. The danger of lack of knowledge is a blind following of instructions and copying statistical formulae, or, even worse, feeding data into a computer loaded with a program that is said to print out the required information. In serious persons, such approaches may leave a feeling of dissatisfaction or even of professional incompetence, be cause of inability to direct or evaluate the procedure critically. If a student tries to improve his or her situation, he/she will find that the few existing forest inventory textbooks, though some with merit, either use confusing statistical symbols or do not adequately cover theoretical principles.