The value soil reactions with statistical significance to the total carbon in the soil in which your Hardon (1935), and Mein van Noordwijk et al. (1997) found that soil has a pH of less than 5.0 is affect digestion processes organic compounds have reduced performance. Activities in biology and also found that the acid soil can affect the stability of the อินทรีย object and minerals within the soil (Cheasire, 1970 and 1985 Dommergues Mangenot, Ladd et al.1996), while the study of Noordwijk van Mein et al. (1997) in the forest area of Indonesia said that the quantity of soil organic carbon in forest areas is related to the pH of the soil and soil organic carbon is the smallest quantity, pH 5.0-6.0.
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