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Pedogenesis (from the Greek ''pedo''-, or ''pedon'', meaning 'soil, earth,' and ''genesis'', meaning 'origin, birth') is the science and study of the processes that lead to the formation of soil (soil evolution)〔Stanley W. Buol, F.D. Hole and R.W. McCracken. 1997〕 and first explored by the Russian geologist Vasily Dokuchaev (1846 – 1903), the so-called grandfather of soil science, who determined in 1883〔Dokuchaev, V.V. 1883. Russian Chernozem.〕 that soil formed over time as a consequence of climatic, mineral and biological processes, which he demonstrated using the soil forming equation: : In 1941, the Swiss scientist Hans Jenny expanded Vasily Dokuchaev equation by adding topographic relief as a factor and separating the biological processes into the fauna and flora coming up with the equation: : Pedogenesis is a branch of pedology, whose other aspects include the soil morphology, classification (taxonomy) of soils, and their distribution in nature, present and past (soil geography and paleopedology). ==Climate== Climate regulates soil formation. Soils are more developed in areas with higher rainfall and more warmth. The rate of chemical weathering increases by 2-3 times when the temperature increases by 10 degrees Celsius. Climate also affects which organisms are present, affecting the soil chemically and physically (movement of roots). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pedogenesis」の詳細全文を読む スポンサード リンク
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