Thursday, June 1, 2017

Controlling Thinning: Some Concepts and Methods

Cornell University - Forest Connect

Date: June 21, 2017
Time: noon - 1:00 PM, eastern time
           and 7:00 - 8:00 PM 

Registration: You need a free personal registration ID to join this month’s webinar:

If prompted for a password use “Cornell”

After registration, which includes a question about whether you want CEU credits, you will receive the link to the webinar and a password. It should go without saying that you should retain this email. The registration email provides the link you will use the day of the webinar.

Presentation summary:
The presentation will deal with four main issues related to thinning in even-aged hardwood stands at intermediate stages of development, drawing on long-accepted hypotheses and models of stand production and tree growth to articulate a conceptual basis for regulating thinning intensity and judging an appropriate method to use. Broad topics will include:

1. How much to leave
Part 1 will review classic models describing relationships between stand stocking and both gross and net production. It will use well-accepted hypotheses by Langsaeter (1941) and Mar:Möller (1954), as well as more recent findings from Northeastern North America.

2. How stand stocking affects tree growth rates
Part 2 will examine effects of stand stocking level on individual tree growth as hypothesized by Langsaeter (1941), Daniel et al. (1979), and Marquis (1986). It will also consider the importance of enhanced diameter growth in maintaining full net production after a properly controlled thinning.

3. What trees to favor
Part 3 will explore relationships between tree crown position and diameter on post-thinning growth, using hypothesis by Assmann (1970), along with observations by Marquis (1991), Nyland et al (1993), and others.

4. How to make it work
Part 4 will review how these concepts fit with characteristics and expected responses after thinning-from-below and crown thinning in conjunction with leaving B-level relative density. It will also contrast these with effects of dimeter-limit cutting in even-aged stands.

Presented By:
Dr. Ralph Nyland, State University of New York – College of Environmental Science and Forestry

*** Please note: Continuing Education credits are not available for reviewing recorded webinars. You must participate in the live seminar to receive credit.

This webinar counts for 1 hour of PA SFI Continuing Education (C.E.) credit. You must complete 3 additional hours of C.E. credit to add 1 year to your training card expiration date. Individuals seeking C.E. credit must submit a completed Non-SFI Course C.E. credit form (Please request that the webinar administrator send PA SFI confirmation of your participation), a course agenda or certificate of completion, and a $20 administrative fee (Check made payable to “PA SIC”) to the PA SFI office. Continuing Education credit can only extend your PA SFI Training Card expiration date by a maximum of 3-years from the current calendar year. Please refer to the PA SFI Training Policy for a complete description of the program requirements.