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According to a top soil calculator on a garden store website I recently removed, topsoil weighs 1.3 tonnes per cubic meter. That is 19.2 x 10 9 m 3 {\displaystyle 19.2x10^{9}m^{3}} lost every year. Evaluating Topsoil
The United States loses almost 3 tons of topsoil per acre per year. [16] 1 inch (2.5 cm) of topsoil can take between 500 [17] and 1,000 years [18] to form naturally, making the rate of topsoil erosion a serious ecological concern. Based on 2014 trends, the world has about 60 years of topsoil left. [18] [19]
The dry bulk density of a soil greatly depends on the mineral assemblage making up the soil and on its degree of compaction.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.
The British imperial gallon (frequently called simply "gallon") is defined as exactly 4.54609 dm 3 (4.54609 litres). [4] It is used in some Commonwealth countries, and until 1976 was defined as the volume of water at 62 °F (16.67 °C) [ 5 ] [ 6 ] whose mass is 10 pounds (4.5359237 kg).
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Soil erosion may be a slow process that continues relatively unnoticed, or it may occur at an alarming rate causing a serious loss of topsoil. The loss of soil from farmland may be reflected in reduced crop production potential, lower surface water quality and damaged drainage networks. Soil erosion could also cause sinkholes.