Mehlich-3 and calcareous soils
February 27, 2021
The Mehlich-3 (M3) extraction solution is known to be a fairly aggressive and it will “over-extract” base cations, such as calcium, when it is used to assess calcareous soils. In this Update, we will provide our opinion on use of MLSN guidelines for developing nutrient management plans for calcareous soils and provide conversion factors for the ammonium acetate (AA) extraction method that is more commonly used for evaluation of calcareous soils and we will also provide a comment on the…