Loblolly Pines

Accurate Forest Inventory

The basics of practical and efficient
timber cruising, plus a great review for the NC Registered Forester Exam

Hampton Inn RBC Center - Raleigh, NC
December 15, 2011 - Introduction to Forest Inventory and Sampling

December 16, 2011 - Advanced Forest Inventory and Sampling

About the Workshop

This workshop will give timber cruisers, forestland managers, and appraisers the information they need to design accurate and efficient forest inventories. The instructor will explain the major methods of inventory cruising, including prism, fixed plots, and strips. Participants will learn to develop statistically reliable inventories and to make informed conclusions based on cruise results. The field exercise will provide opportunity for hands-on comparison of the various inventory methods. Emphasis will be placed on practical considerations with numerous applications and examples. This course will also be a comprehensive review for those planning to take the North Carolina registered foresters’ exam. Registration includes a comprehensive notebook with material covered in the course. Familiarity with forestry terms and concepts is assumed.

The course will be broken up in to two sections so that participants can choose which portions meet their goals. Section 1 will be an introduction to forest inventory and sampling course, while Section 2 will cover more advanced topics in forest inventory and sampling. If you do not have much experience with forest inventory techniques, then it is recommended that you sign up for both sections. Return to top of page.

Who Should Attend?

This course will be valuable to forestry consultants, engineers, landscape architects, appraisers, and regulatory professionals who are responsible for acquiring and analyzing stand-level information. Attendees at this workshop in the recent past have told us it was invaluable preparation for taking the NC Registered Forester Exam. It is recommend for professional appraisers and land surveyors as well. Return to top of page.

About the Instructors

Bronson Bullock is assistant professor of forest biometrics and timber management in the Department of Forestry and Environmental Resources at North Carolina State University. Bronson has been at NCSU for six years and teaches Forest System Mapping and Mensuration I, Forest Systems Mapping & Mensuration II at the forestry summer camp, and Forest Measurements, Modeling, and Inventory in the undergraduate curriculum; he also teaches graduate level courses on Advanced Forest Modeling. Bronson has a B.S. in Natural Resources Management – Forestry from Rutgers University, M.S. in Forest Biometrics, M.S. in Statistics, and Ph.D. in Forest Biometrics from Virginia Tech. His research interests focus around traditional and upcoming techniques in forest biometrics (volume and taper equations, weight equations, growth and yield modeling, spatial statistical applications to forest inventory and modeling, etc.) Return to top of page.

Lodging and Transportation

The workshop will be held at the College of Natural Resources, NC State University in Raleigh, NC. A map with directions will be included with your registration confirmation letter. Lodging is not included in the registration fee, however, rooms have been blocked at the Ramada Inn Blue Ridge Road. To make a reservation call 919-832-4100 before December 1st and mention that you are with the group “NCSU Forestry ”. Transportation is provided to and from the nearby field site on Thursday, December 17. Return to top of page.



Attendees should bring a calculator. For Thursday's field trip we will utilize hard hats, BAF 10 prism, loggers tape, D-tape, compass, and clinometer. Instructors will be bringing field measurement instruments if you don't have your own. Laptops will be provided, but students wishing to bring their own laptops may do so. Be sure to wear appropriate field attire, and bring rain gear. Return to top of page.


Tentative Agenda Thursday, December 15
Introduction to Forest Inventory and Sampling

7:30 Registration
8:00 Introduction: Workshop Overview
8:15 Statistics Review – Populations and samples; calculating means, variances, standard deviations, and confidence intervals; interpretations; bias; precision; accuracy; linear regression; statistical summaries and interpretations
9:30 Log Volume and Taper – Smalian’s, Newton’s, & Huber’s formulas; determining log volume and taper
10:00 Break
10:15 Log Rules and Measuring Merchantable Timber – Doyle, Scribner, Int-¼ log rules; scaling logs; log grading; tally errors effect on volume; Girard form class used in volume calculations
10:45 Forest Inventory – Stand and stock tables; strip cruising; 100% cruising
11:15 Forest Sampling with Fixed Radius Plots – applications and summary statistics (basal area per acre, trees per acre, volume per acre); edge bias; sample size determination
12:00 Lunch
1:00 Forest Sampling with Variable Radius Plots – applications and summary statistics (basal area per acre, trees per acre, volume per acre by volume factors approach); edge bias; sample size determination
2:15 Forest Sampling cont. – Regeneration surveys; review sampling designs; cover type mapping
3:00 Field Exercises – Install several plot and point samples and summarize the results; travel to Schenck Forest for fieldwork.
5:00 Adjourn
5:30 - 6:30 Social Hour
Note: The workshop will take place, rain or shine. Please dress accordingly.
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Tentative Agenda Friday, December 16
Advanced Forest Inventory and Sampling

7:30 Registration
8:00 Introduction: Workshop Overview
8:15 Forest Inventory Review – Summary statistics for point and plot sampling data collected during Section I; stand and stock tables; effect of errors in sampling on estimates
9:30 Forest Inventory and Sampling Statistics – Simple random sampling; Systematic random sampling; Stratified random sampling; Stratified systematic sampling; Sample size determination
10:00 Break
10:15 Stratified Random Sampling cont. – Statistics and examples
11:15 Double Sampling with Regression – Statistics and examples
12:00 Lunch
1:00 Big BAF Sampling – Statistics, installation, and examples
1:45 Variable Radius Plot Sampling – Volume calculations by the VBAR approach; Weight calculations by the WBAR approach
2:30 Sampling Design Issues – Merchantability specifications; errors; volume equations and tables – information needed for use; outputs and conversions; comparing point and plot samples
3:00 Break
3:15 Cluster Sampling – statistics and examples
3:45 Two-Stage Sampling – statistics and examples
4:15 3P Sampling – statistics and examples [Time Permitting]
4:45 Course evaluations
5:00 Adjourn
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Registration and Fees

The registration fee is $145 for one day or $265 for both days. This includes instruction, course materials, lunch, refreshment breaks, and field trip transportation. Registration deadline is December 5th. In order to enhance the experience of all participants, enrollment in the workshop is limited to the first 30 registrants. Registration for this workshop is now being taken by phone at 919-515-9563.


Cancellations made by December 5th will receive a refund less a $25 service charge. Cancellations made after December 5th are not eligible for a refund and sending a substitution attendee is recommended in this situation.


  • Society of American Foresters CFE in Category will be offered for December 15 and 16, 2011.
  • The North Carolina Appraisal Board no long approves this course.

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Favorite Links

Newly Added
NC Mills Seeking Wood

NCSU Dept of Forestry and Environmental Resources

Jordan Hall Addition

Forestry Webinars

NC Division of Forest Resources

NC Board of Registration for Foresters

Pesticide Credits from NC Department of Ag & Consumer Svs.

North Carolina Chapter of the Association of Consulting Foresters

NC Woodlands

North Carolina Forestry Association

North Carolina Association of Professional Loggers

NC Urban Forest Council

Society of American Foresters

Southern Center for Sustainable Forests

The Longleaf Alliance

Forest Guild

NCDENR Permit Handbook

Local Lodging in Raleigh, NC


**Please note FEOP event details ares subject to change including the possibility of cancellation.
Contact Us: NCSU-FEOP, Campus Box 8008, Raleigh, NC 27695-8008
Phone: 919-515-9563 or 919-515-3184
Fax: 919-515-6883

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