Question: Two soils both have pHs = 5.5 and BS = 60%; soil A has a CEC = 3 cmol(+)/kg, while soil B has a CEC

  1. Two soils both have pHs = 5.5 and BS = 60%; soil A has a CEC = 3 cmol(+)/kg, while soil B has a CEC of 7 cmol(+)/kg.
    1. Calculate how much acidity (H + Al, exchangeable acidity) is held by these two soils, assuming that exch. acids + bases = CEC.

Since this acidity is in equilibrium with the solution, it has to be neutralized by lime in order to raise the pH.

  1. Which soil do you think would take more lime to reach a target pH = 6.5?

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