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The density of quartz is around 2.65 g/cm 3 but the dry bulk density of a soil can be less than half that value. Most soils have a dry bulk density between 1.0 and 1.6 g/cm 3 but organic soil and some porous clays may have a dry bulk density well below 1 g/cm 3 .
Table of area (square) units Unit Plural Relative value Metric value Imperial value Notes pulzier kwadru: pulzieri kwadri 1 ⁄ 144 ~4.765 cm 2 ~0.7385 sq in fitel kwadru: iftla kwadri 1 ⁄ 4 ~171.5 cm 2 ~26.59 sq in xiber kwadru: xbar kwadri 1 ~686.1 cm 2 ~106.3 sq in qasba kwadra: qasab kwadri, or qasbiet kwadri 64 ~4.391 m 2 ~5.252 sq yd an ...
A study of a single winter rye plant grown for four months in one cubic foot (0.0283 cubic meters) of loam soil showed that the plant developed 13,800,000 roots, a total of 620 km in length with 237 square meters in surface area; and 14 billion root hairs of 10,620 km total length and 400 square meters total area; for a total surface area of ...
1 feddan = 24 kirat = 60 metre × 70 metre = 4200 [2] square metres (m 2) = 0.420 hectares = 1.037 acres [3] In Syria , the feddan is a vaguer quantity, referring to the amount of land that can be ploughed by a pair of oxen in a year, being about 5–12 ha (12–30 acres).
Basal area is the cross-sectional area of trees at breast height (1.3m or 4.5 ft above ground). It is a common way to describe stand density. In forest management, basal area usually refers to merchantable timber and is given on a per hectare or per acre basis. If one cut down all the merchantable trees on an acre at 4.5 feet (1.4 m) off the ...
Image comparing the hectare (the small blue area at lower left) to other units. The entire yellow square is one square mile.. The hectare (/ ˈ h ɛ k t ɛər,-t ɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land.
Fabric "weight" is often specified as mass per unit area, grams per square meter (gsm) or ounces per square yard. It is also sometimes specified in ounces per yard in a standard width for the particular cloth. One gram per square meter equals 0.0295 ounces per square yard; one ounce per square yard equals 33.9 grams per square meter.
Allen Hazen derived an empirical formula for approximating hydraulic conductivity from grain-size analyses: = where Hazen's empirical coefficient, which takes a value between 0.0 and 1.5 (depending on literature), with an average value of 1.0. A.F. Salarashayeri & M. Siosemarde indicate C is usually between 1.0 and 1.5, with D in mm and K in cm/s.