oa Agrochemophysica - Research note : exchange acidity as criterion for the liming of orchard soils in the Western Cape

Volume 11, Issue 3
  • ISSN : 0302-7112



In an appreciable number of orchard soils with inherent low lime requirement, exchange acidity underestimated the lime requirement by a factor of up to 6,5 fold. These soils invariably contained large amounts of Ca and/or Mg and prediction of lime requirement could be improved considerably by inclusion of exchangeable (Ca+Mg) with exchange acidity in the equation. The regression coefficient for exchangeable (Ca+Mg) was positive.

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