Height Growth in Western White Pine Progenies PDF Download
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Author: G. E. Rehfeldt
Publisher:
ISBN:
Category : Pine
Languages : en
Pages : 28
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Book Description
Author: G. E. Rehfeldt
Publisher:
ISBN:
Category : Pine
Languages : en
Pages : 28
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Book Description
Author:
Publisher:
ISBN:
Category : Western white pine
Languages : en
Pages : 148
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Author: Raymond J. Hoff
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 148
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Book Description
Author: James L. Jenkinson
Publisher:
ISBN:
Category : Ponderosa pine
Languages : en
Pages : 16
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Book Description
Wind-pollinated families from four geographic areas in the northern Sierra Nevada were tested in the nursery. For every area, the native families differed significantly from each other in 1-year seedling height, and in 2-year height, diameter, and stem volume. Family growth was poorly correlated with family seed weight; it was independent of germination speed and seed parent stem volume. The size of planting stock can be improved and small-grade seedling production decreased by eliminating from future collections seed trees whose families show poor growth in the nursery.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 192
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Author: R. T. Bingham
Publisher:
ISBN:
Category : White pine
Languages : en
Pages : 28
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Author: Richard T. Bingham
Publisher:
ISBN:
Category : Blister rust
Languages : en
Pages : 52
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Author: Elvera A. Axelton
Publisher:
ISBN:
Category : Ponderosa pine
Languages : en
Pages : 158
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Author: Craig D. Whitesell
Publisher:
ISBN:
Category : Abies concolor
Languages : en
Pages : 182
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Book Description
Ohia forest decline-its severity and rate of spread-was studied by aerial photographic techniques on a 197,000-acre (80,000-ha) portion of the island of Hawaii. In 1954, only 300 acres (121 ha) showed signs of severe decline; by 1972, the acreage of severely affected forest had increased to 85,200 acres (34,480 ha). Rate of decline and current severity were related to mean annual precipitation and to elevation. The epidemic is continuing. Some forests on other Hawaiian islands also display decline symptoms.
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 32
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