Foresters have traditionally used total tree height at a fixed index age to classify the forest productivity at any given location (soil, topography and climate). While useful in the 1930 – 1980 years, researchers such as Boris Zeide (1978) recognized that all trees of a species do not follow a single growth form (by site … Continue reading What is 10-meter Site Index?
The chart below is a display of 16,669 cruised stands from multiple forest ownerships in multiple western States. The standing cubic foot volume is charted by stand top height to remove any concern about age or site class differences. Average volumes by top height class (60, 90, 120 and 150-feet) are summarized by clumpiness index … Continue reading Question: Does Stand Clumpiness have an Effect on Total Yield?
This guidebook has been 20 years in building. It has been regularly distributed as a hard copy 328 page textbook along with the Forest Projection and Planning System (FPS) software. The FBRI has now made this guidebook a free download from this site (and from ResearchGate.net). FPS Forester’s Guidebook This guidebook provides methods, sequences of … Continue reading The Forester’s Guidebook for Managing Working Forests
This two-day workshop will demonstrate and prescribe the steps to localize these growth dynamics for both micro-site (silviculture) and macro-site (yield capacity).
It has always been appealing to attempt to estimate site index by observing the height growth rate in young trees at early ages (Bull, 1931). Various methods have been proposed with varying starting heights and numbers of years to observe (Wakeley, 1954). With the development of the 10m Site Index classification methodology (Arney, 2010) there … Continue reading Estimating Silvicultural Gain using a Height-Intercept Approach
In recent months we have been attempting to incorporate requests from FPS users to match their desired forestry applications. We have also upgraded FPS software tools where errors or bugs were identified. Most significant were multiple requests to allow full transfer of cruised stand records from the PLOTS table to the DBHCLS table when compiled.
Foresters must inventory large landscapes on a regular (periodic) basis. Due to the magnitude of this task, there is a long history of viable shortcuts that have merit when determining the kind and intensity of field sample designs. However, this task does not have a constant, single objective. Traditionally, a field sample was obtained to … Continue reading Technical Note on Cruise Designs
The Forest Biometrics Research Institute (FBRI) gets frequent inquiries about the similarities and differences between the FPS software suite and other software tools available or known in the forest industry. This has become such a significant and repeated topic that a handout was developed for the 2014 International Conference of the Society of American Foresters (SAF), Canadian … Continue reading Comparison of Software Suites
Each of the FPS software components are tested and updated on an annual basis or as soon as a problem is identified and verified. The Cruise Compiler comes under intense scrutiny on a regular basis due to its use in all kinds of stand structures and field sample designs. The following PDF provides an abstract … Continue reading FPS Cruise Compiler – Update History
The FPS Cruise Compiler is unique in forestry. It will handle all stand structures and variations of sub-sampling of tree parameters. The following PDF provides some insight into these attributes of FPS. FAQ FPS Cruise Compiling and Site