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When stocking, a tree's basal area is measured. The basal area is a cross-sectional area of the stump taken about 4.5 feet (1.4 m) above the ground. [7] The equation for calculating the basal area of trees in a stand is Basal Area = 0.005454 DBH 2, where DBH is the diameter of the tree at the aforementioned measuring height. [7]
For example, using the 'Stocking Tool' it is possible to calculated the number of trees required, given a row and in-row spacing, and area to be planted. The 'Health Tool' has a similar approach. A user can diagnose tree health problems using the Toolbox, replacing the need to use reference texts, or having to enlist the assistance of a forest ...
Plant density is the number of individual plants present per unit of ground area. It is most easily interpreted in the case of monospecific stands, where all plants belong to the same species and have germinated at the same time. However, it could also indicate the number of individual plants found at a given location.
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The above equation is an expression for computing the stand density index from the number of trees per acre and the diameter of the tree of average basal area. Assume that a stand with basal area of 150 square feet (14 m 2) and 400 trees per acre is measured. The dbh of the tree of average basal area D is:
A seed rate of about 100 kg of seed per hectare (2 bushels per acre) is typical, though rates vary considerably depending on crop species, soil conditions, and farmer's preference. Excessive rates can cause the crop to lodge, while too thin a rate will result in poor utilisation of the land, competition with weeds and a reduction in the yield .
For coniferous species this will be a minimum of 2500 stems per hectare at year 5 (from planting). Planting at this density has been shown to favour the development of straighter knot-free logs. [citation needed] Planters are normally paid under piece work terms and an experienced worker will plant around 1600 trees a day under most conditions.
Even though the tariffs are far from certain, a number of companies have explicitly said the levies floated by Trump would inevitably force them to raise prices for consumers. "Lock in our current ...
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