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Springer -just now

Stand growth and structure of ...

Abstract Past failures of monocultures, caused by wind-throw or insect damages, and ongoing climate change currently strongly stimulate research into mixed-species stands. So far, the focus has mainly been on combinations of species with obvious complementary functional traits. H...

Elsevier -10 hours ago

Topographic variation in tree ...

Publication date: 15 September 2020Source: Forest Ecology and Management, Volume 472Author(s): Jan Ng, Malcolm P. North, Alec J. Arditti, Monica R. Cooper, James A. Lutz...

USFS -23 hours ago

The economic significance of t...

...

USFS -2 days ago

Perfection a stand-density ind...

<p>An adequate expression for density of stocking in even-aged forests has long been sought by foresters. Comparison of total basal area of the stand with yield-table values of basal area for the same age and site quality has been the usual method of evaluating stand density. Other methods hav...

USFS -2 days ago

K-screen seed spots...

<p>A new type of protective screen for seed spots has attracted the attention of foresters on the Pacific coast. This screen is cylindrical in form, 4 inches long, about 1 inch in diameter, and is formed from 8-mesh hardware cloth. Foresters have named this protective device a "K-screen&q...

USFS -2 days ago

A trial of three chemicals as ...

Sodium fluoroacetate (compound "1080") and, to a lesser extent, red lead and zinc phosphide, have been suggested for use as rodent repellents in direct seeding. On the basis of a small test in 1950 on the Stanislaus Experimental Forest in California, none of these chemicals appears effecti...

USFS -2 days ago

Ponderosa pine cone cutting by...

Squirrels may harvest a far greater proportion of ponderosa pine cones than many foresters realize. This was evident while making a routine cone count on a number of permanent plots on the Stanislaus Experimental Forest near Pinecrest, California, in September 1952. Ponderosa and Jeffrey pines were ...

USFS -2 days ago

Effect of storage temperature ...

The effect of storage temperature on the viability of sugar, Jeffrey, and ponderosa pine seed was studied to determine a suitable condition for each of the three species. Barton has reported -4° C. (25° F.) as being better for ponderosa pine than either -11° C. or -18° c. (12° F. or 0° F.), bu...

USFS -2 days ago

Freezing injury to sugar pine ...

Evidence that immature sugar pine cones are killed by severe late spring freezes was observed for the first time on the Stanislaus Experimental Forest in 1954. Although extremely low temperatures previously were suspected to have destroyed young sugar pine cones, no definite instances are known to h...

USFS -2 days ago

Recent trials with 2,4-D and 2...

Brush competition is one of the more serious obstacles to survival of both planted and naturally established trees in California. Brush has taken over many cutover and burned areas. In the western Sierra Nevada alone, 1.7 million acres of commercial forest land are classified as poorly stocked or no...

USFS -2 days ago

Effect of fertilizer on cone p...

Fertilizing seed trees may be one way to improve reforestation of cut-over and fire-destroyed timber stands in California. One of the chief difficulties in reforestation here is that most of the commercial conifers do not produce good crops of seed-bearing cones often enough. Heavy crops have been a...

USFS -2 days ago

Early survival and growth of s...

The preponderance of white fir regeneration on sugar pine management units has always plagued forest managers in the sugar pine-fir type in the Sierra Nevada. Clear cutting small even-aged groups appears to offer at least a partial solution to this problem. In one recent study more white fir than su...

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