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Blue ash is a medium sized deciduous tree typically reaching a height of 10–25 m (33–82 ft) with a trunk 50–100 cm (20–39 in) in diameter. The twigs typically have four corky ridges, a distinctive feature giving them a square appearance (in cross-section), hence the species name, quadrangulata, meaning four-angled.
Wood ash is the powdery residue remaining after the combustion of wood, such as burning wood in a fireplace, bonfire, or an industrial power plant. It is largely composed of calcium compounds, along with other non-combustible trace elements present in the wood, and has been used for many purposes throughout history.
Wood stain is a type of paint used to colour wood comprising colourants dissolved and/or suspended in a vehicle or solvent. Pigments and/or dyes are largely used as colourants in most stains. The initial application of any paint or varnish is absorbed into the substrate similarly to stains, but the binder from a stain resides mainly below the ...
The wood of old ash trees in general are valued for firewood due to their fine grain and brittleness. It is commonly used as an ornamental or shade tree within and beyond it native range of the Pacific Northwest because of its rapid growth rate, symmetrical shape, and hardiness.
The color of the ash comes from small proportions of inorganic minerals such as iron oxides and manganese. The oxidized metal elements that constitute wood ash are mostly considered alkaline. For example, ash collected from wood boilers is composed of [6] 17–33% calcium in the form of calcium oxide (CaO)
Fraxinus angustifolia subsp. angustifolia has become a weed in many parts of Australia, where it is known as Desert Ash. It has been widely planted as a street and park tree, and has spread to native bushland and grasslands, as well as stream banks and drainage lines, out-competing native plants for moisture, light and nutrients.
European ash in flower Narrow-leafed ash (Fraxinus angustifolia) shoot with leaves. Fraxinus (/ ˈ f r æ k s ɪ n ə s /), commonly called ash, is a genus of plants in the olive and lilac family, Oleaceae, [4] and comprises 45–65 species of usually medium-to-large trees, most of which are deciduous trees, although some subtropical species are evergreen trees.
The name white ash derives from the glaucous undersides of the leaves. It is similar in appearance to the green ash, making identification difficult.The lower sides of the leaves of white ash are lighter in color than their upper sides, and the outer surface of the twigs of white ash may be flaky or peeling.