Using the Gingrich (1967) Stocking Chart for Upland Hardwood forests in the

Central States

Gingrich, S. F. 1967. Measuring and evaluating stocking and stand density in Upland Hardwood forests in the Central States. Forest Science. 13:38-53.

So let’s try an example stand with a density of 200 trees ac-1 and basal area of 90 ft2 ac-1

So let’s try an example stand with a density of 200 trees ac-1 and basal area of 90 ft2 ac-1

So let’s try an example stand with a density of 200 trees ac-1 and basal area of 90 ft2 ac-1

So let’s try an example stand with a density of 200 trees ac-1 and basal area of 90 ft2 ac-1

So let’s try an example stand with a density of 200 trees ac-1 and basal area of 90 ft2 ac-1

What is the stand’s stocking level?

What is the stand’s stocking level?

What is the stand’s stocking level? 80%

To determine this, we must know:

1. Stand’s current basal area

2. Basal area at B-Line stocking for the given stand’s average tree diameter

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

To determine this, we must know:

1. Stand’s current basal area

2. Basal area at B-Line stocking for the given stand’s average tree diameter

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

We already know the stand’s current basal area is 90 ft2 ac-1

To determine this, we must know:

1. Stand’s current basal area

2. Basal area at B-Line stocking for the given stand’s average tree diameter

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

We already know the stand’s current basal area is 90 ft2 ac-1

We determine the basal area at B-Line stocking for the given stand’s average tree diameter by using the stocking chart.

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

Basal area at B-Line stocking is ~ 65 ft2 ac-1

This is equal to:

current stand basal area - basal area at B-Line stocking

So, maximum amount of basal area that can be removed without resulting in an understocked stand is

= 90 ft2 ac-1 – 65 ft2 ac-1

= 25 ft2 ac-1

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

Class Exercise:

Determine the percent stocking for a stand with a density of 150 trees ac-1 and basal area of 115 ft2 ac-1

Answer: 95% Stocking

Determine the percent stocking for a stand with a a density of 150 trees ac-1 and basal area of 115 ft2 ac-1

95

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

95

Class Exercise:

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?

Class Exercise:

Basal area at B-Line stocking is ~ 71 ft2 ac-1

This is equal to:

current stand basal area - basal area at B-Line stocking

So, maximum amount of basal area that can be removed without resulting in an understocked stand is

= 115 ft2 ac-1 – 71 ft2 ac-1

= 44 ft2 ac-1

What is the maximum amount of basal area that can be removed without resulting in an understocked stand?