Using the Gingrich (1967) Stocking Chart for Upland Hardwood forests in the Central States Gingrich, S. F 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 ft 2 ac -1

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 ft 2 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 ft 2 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?

Basal area at B-Line stocking is ~ 65 ft 2 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 ft 2 ac -1 – 65 ft 2 ac -1 = 25 ft 2 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 ft 2 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 ft 2 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 ft 2 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 ft 2 ac -1 – 71 ft 2 ac -1 = 44 ft 2 ac -1 What is the maximum amount of basal area that can be removed without resulting in an understocked stand?