Natural seed fall in white pine (Pinus strobes L.) stands of varying density

Raymond E. Graber

Treesearch

Natural seed fall in white pine (Pinus strobes L.) stands of varying density

Informally Refereed

Authors:

Raymond E. Graber

Year:

1970

Type:

Research Note

Station:

Northern Research Station

Source:

Research Note NE-119. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 6p.

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Abstract

Seed fall was observed in three stands of mature white pines at stand basal-area densities of 80, 120, and 187 square feet per acre. It was found that the intermediate-density stand produced nearly 50 percent more seed than the stands of other densities. During a good seed year this stand produced 59 pounds of dry sound seed per acre. Most of the seeds were dispersed during a 7-week period beginning about the middle of September. The seed crop was reduced by action of birds, animals, and insects.

Citation

Graber, Raymond E. 1970. Natural seed fall in white pine (Pinus strobes L.) stands of varying density. Research Note NE-119. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 6p.