Natural Resource Biometrics


Send Email




Course Topics

Examples

Software

Memo Format

Report Format

Schedules of Assignments

Course Objectives

Important University Policies

Class Time and Place

Prerequisites

Blackboard

This page is the general description of the course and suggested expectations for both the student and the expectations of the teacher.

Stand Stocking

Formated version of this page for printing

Stand stocking is a measure of site occupancy. It is often defined as a maximum average stocking. This is often presented as a relative index (percent stocking).

Gingrich Stocking Charts

The Gingrich Diagram was present in 1964, in conference proceedings and again in 1967 in Forest Science.  This diagram illustrates the relationship between basal area per acre, density (trees per acres) and the quadratic mean diameter (the diameter of the tree of average basal area).  The A-line is based on the normal stocking concept from normal yield tables.  Growth in stands above 100% is considered  to slow for normal forest management.  The B-line is the point of crown closure of trees with a maximum crown width.  A stand on the B-line is thought to have trees with no competition, yet no space wasted.  The C-line is an estimate based on normal yield table of the lowest stocking that will grow to the B-line within ten years.


Figure 1: Gingrich Stocking Diagram

Also see:
Gingrich, S. F. 1967. Measuring and evaluating stocking and stand density in Upland Hardwood forests in the Central States. For. Sci. 13:38-53.
Husch, B., C. I. Miller and T. W. Beers. 1993. Forest Mensuration. Third Edition. Krieger Publishing Co., Malabar, Florida 402 p.
Kershaw, Jr, J. A. and B. C. Fischer. 1991. Maximum size-density relationships for sawtimber-sized mixed upland central hardwoods.  In: "The 8th Annual Central Hardwoods Conference",  L. H. McCormick and K. W. Gottschalk eds. USDA, Forest Service, Northeastern Forest Experiment Station, General Technical Report, NE-148, pp. 414-428.
Krajicek, J. E. and K. A. Brinkman and S. F. Gingrich. 1961. Crown competition-a measure of density, For. Sci. 7:35-42.

Created: November 27, 2000 by David R. Larsen
Last Updated: August 7, 2008