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四标准英尺的单位

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  • Picea sitchensis - Wikipedia
    Picea sitchensis, the Sitka spruce, is a large, coniferous, evergreen tree growing to just over 100 meters (330 ft) tall, [3] with a trunk diameter at breast height that can exceed 5 m (16 ft)
  • Sitka Spruce | Silvics of North America
    Sitka spruce (Picea sitchensis), known also as tideland spruce, coast spruce, and yellow spruce, is the largest of the world's spruces and is one of the most prominent forest trees in stands along the northwest coast of North America
  • Sitka Spruce (Picea sitchensis) – Growing Guide
    Complete guide to Sitka Spruce (Picea sitchensis): the world's largest spruce species Growing tips, soil water needs, wildlife value, and conservation info Native to Oregon Washington
  • About Sitka spruce | Tree Identification, Properties Uses | Softwood . . .
    Sitka spruce is the largest of the spruces, growing up to 70 metres tall and two metres in diameter Found along the Pacific Coast, it is valued for wood that is light, soft, relatively strong and flexible
  • Sitka Spruce - calscape. org
    Native to the northwest coast of North America, primarily Humboldt and Del Norte Counties in California, it is by far the largest species of spruce, and the third tallest conifer species in the world (after Coast Redwood and Coast Douglas-fir)
  • Sitka Spruce, Picea sitchensis | Native Plants PNW
    Many Sitka Spruce trees were felled during the early part of last century for the manufacture of airplanes and boats that were used during World Wars I II The wood is also valued for its resonant quality and is used in making pianos and guitars
  • Sitka Spruce | The Wood Database (Softwood)
    Comments: Sitka Spruce has an outstanding stiffness-to-weight ratio, and is available in large, straight-grained pieces, lending this timber to a wide range of commercial uses
  • Picea sitchensis (Coast Spruce, Sitka Spruce, Tideland Spruce) | North . . .
    Sitka spruce is a large, coniferous, needled evergreen tree that can grow from 40 to 230 feet tall It can grow to have a trunk diameter of 16 to 22 feet Reportedly, it is the largest species of spruce, the third tallest conifer species in the world, and the fourth largest conifer
  • CNPS Alliance: Picea sitchensis
    Picea sitchensis is a conifer that attains a height of 70 m and an age of 800 years The root system is usually shallow, except on well-drained alluvium Plants produce cones between 20 and 40 years of age Dispersal of seeds is moisture dependent, with mature, dry cones dispersing numerous seeds Seeds can travel over 750 m from parent plants
  • SITKA SPRUCE - USDA
    Sitka spruce is a large, native, evergreen tree that can grow up to two hundred feet in height The needles are yellowish-green to bluish-green, stiff, very sharp, 1 to 11⁄2 inches long, with white lines of stomata on the upper surface (Pojar MacKinnon 1994)





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