|
|
|
|
|
|
by tfehring
2710 days ago
|
|
|
> Topsoil should properly be measured in volume, not distance. Presumably topsoil generation is proportional to land area, and volume per unit area reduces to distance. 3 cm per 1000 years is equivalent to 30 m^3 per km^2 per year. That said, the number still seems wrong. Table 5.2 in [0] indicates that regeneration rates range from 0.25 mm/year to 2.0 mm/year. 3 cm per 1000 years is equivalent to 0.03 mm per year, almost an order of magnitude lower than the lowest rate in that table. [0] http://www.fao.org/docrep/009/t0733e/T0733E06.htm |
|
|