The FPS 10-meter Site Index, SiteGrid and CASH Card Localization – A Workshop on Localizing the FPS Universal Growth Model

Date: June 6, 2017 - June 7, 2017
Location: CH2M Hill Alumni Center, Oregon State University, Corvallis, OR

Event Agenda

CH2M Hill Alumni Center
June 06: 8:00
• Introduction to 10-meter site index methodology
• Measuring Site trees – traditional to FPS 10-meter method
• Defining 10-meter Site, %Regen and %Shape parameters
• Introducing the Taper / Site Field recording methods and forms
• Individual tree applications with Excel spreadsheet
• Loading FPS TapHead, TapTree, TapForm and SiteTree tables

Lunch (provided)
June 06: 12:00

Field Session
June 06: 1:00
Meet at 1:00pm for field trip departure: transportation provided (field clothes suggested)
Stop #1 – Felled-tree Sample
• Large, older stand of Douglas-fir
• Two trees on the ground and measured
• One tree to drop after field inspection
Stop #2 – Young Planted Stand
• Measurements using the FPS CASH Card
• Determining early growth rates relative to Stand, Stop #1

Return to Corvallis
June 06: 5:00

CH2M Hill Alumni Center
June 07: 8:00
• Defining and Gathering Primary Factors – Topography, Soils and Climate
• Building and Populating the GIS SiteGrid layer
o Invoking the SiteGrid Regional Model
• Stratifying the Forest based on Primary Factors
• Bring in and Compile the felled-tree field samples
• Edit and Load SiteGrid with Field Observations
o Observe differences among species

Lunch (provided)
June 07: 12:00

CH2M Hill Alumni Center
June 07: 1:00
• Use FPS “Update Physical Site from SiteGrid”
• Review Nonparametric Regression Report
• Extrapolate SiteGrid to FPS Admin Inventory Database
• Annual Maintenance of SiteGrid GIS layer and Linkage to Nelder Installations

Close of Workshop
June 07: 4:00

Member Regular Price: $325
Non-member Regular Price: $450

Event Description

An FBRI Field Workshop by James D. Arney and Brock Purvis

The newly released FPS 7.50 Universal Library is highly sensitive to localization of site classification and silviculture on each working forest. This capacity is only invoked if the local forester applies the FBRI “Cash Card” and 10-meter “SiteGrid” technologies imbedded in FPS.

This workshop steps through the field and office procedures to localize the FPS Universal Library to your own working forest.

Height growth is perhaps the most widely used basis for indexing site quality. Most commonly, a reference set of site index (height/age) curves is used. As management decisions have increased in complexity, the need for accurate site productivity classification has also increased.
There are three major problems with traditional site index curves that are causing serious concerns; they are:

  • Application of traditional site index curves often results in errors due to plantation intensive culture or overstory suppression. There appears to be no way to separate early silvicultural (micro-site) effects from regional or “macro” site capacity.
  • Site curves, as traditionally constructed, are broad averages which are insufficient to identify the local site specific variation in height growth patterns (soil, topography, and climate).
  • Current management (or the lack thereof) has reduced the population of suitable “site trees” so that it is difficult to obtain reliable traditional site index estimates for each stand in a working forest inventory.

The FPS Cash Card and 10-meter SiteGrid methods provide a direct solution to the first and second concerns. This Workshop provides the methods to index the separate effects of early silviculture and the “natural” site capacity of each stand in your inventory. When combined with soil/site factors in an FPS “SiteGrid”, this approach provides robust estimates of potential height growth trends from bio/geo/climatic variables.

Workshop Objectives

  • Describe the field and analytical steps of this new approach to site classification.
  • Demonstrate how to move past traditional site curves confounded by early silvicultural conditions (early height/age trends).
  • Draw attention to the significance in macro-site height growth patterns (late height/age trends) on yield capacity and optimal rotation ages.

The workshop will be held at the CH2MHill Alumni Center on the Oregon State University campus in Corvallis, OR. The Alumni Center is located at 725 SW 26th St.

Registration fee
The registration fee is $325 for FBRI members and $450 for non-FBRI members. The registration fee includes field trip transportation, a book of speaker materials, two lunches and refreshments.

Payment information
Checks should be made payable to Forest Biometrics Research Institute. Purchase orders, VISA/MasterCard, and American Express are accepted. Tax id # 900103944.

Registration Questions
503-227-0622 or

Event Lodging
No block of rooms has been reserved for this meeting. The nearest hotel is the Hilton Garden Inn at 541-752-5000, which is walking distance from the Alumni Center. Additional hotels are available in Corvallis and are within driving distance.