Soil testing from a well-drained soil sample in 0-15cm depth of a farmers field provides the following information: Soil chemical properties (in
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Soil testing from a well-drained soil sample in 0-15cm depth of a farmers field provides the following information:

Soil chemical properties (in cmol/kg):

Exchangeable  H+: 5

Exchangeable  Mg2+: 3

Exchangeable  K+: 11

Exchangeable Ca2+: 7

Exchangeable Na+: 2

  • Molar mass of H+ = 1; Mg2+ = 24; K+ = 39; Ca2+ = 40 ; Na+ = 23


  1. How many kg ha-1 of exchangeable Na+ is there in this field?
  2. Calculate the percent base saturation.
  3. Is this a fertile soil? why?

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