crown closure
crown cover

A stand of trees so widely spaced, that even with full growth potential realised, crown closure will not occur.

Crown closure is often determined using aerial photographs because ground evaluations become difficult to obtain.

By this time, it appeared that the shorter trees had begun to suffer from competition associated with crown closure.

In the deep snow class, use of both moderate and high crown closures categories exceeded their availability.

Maintain a 70% crown closure within buffer to encourage regeneration of selected species.

Crown closure is a term used in forestry.

There are seven harvests, starting at crown closure.

Widely spaced trees attain crown closure at a later age which means that an additional year or so of weed control may be necessary.

Forest habitat is described by researchers as having low open crown closure due to natural forest dynamics.

Regeneration, or new seedlings, may not be found under some of these core stands if the crown closure is very dense.

Slow self-pruning by plantation spruce, particularly before crown closure, is cited as a possible reason for these differences.

It is concluded that one or more N and P additions are required to establish crown closure.

In even-aged stands, crown closure may be proportional to basal area/ha.

The data presented suggest that this relationship may serve as a useful quantitative index of crown closure in poplar stands.

Estimation of crown closure through line sampling.

Option 2 Core: Conduct a partial harvest, maintaining a crown closure of about 75%.

Maintain at least 70% crown closure, to minimize understorey growth and to increase chances of regeneration survival.

Site quality and stand maturity were more highly associated with top kill than stand height and crown closure.

In each stand, we measured slope, crown closure, basal area, as well as tree height and age.

The slowness of juvenile growth and of crown closure delay the response to intra-competition.

Basal area increment per hectare increased until total crown closure approached 130% and then stayed constant.

An asymtotic stabilization of the rate of intensification over the last 6 years probably reflects crown closure.

As many of these species prefer shaded sites, maintaining specific crown closures will control the amount of light entering the stand.

A single-tree selection winter cut, maintaining 90% crown closure within the buffer would protect these sites, provided they were marked during the field season.

This decline was probably caused by crown closure of the sweetgum trees which gradually suppressed understory vegetation.