oa Agrochemophysica - A comparison of the efficiency of two subsampling methods

Volume 5, Issue 2
  • ISSN : 0302-7112



The efficiency of scooping and splitting procedures to reduce bulk soil samples to analytical samples of 2 to 50 g are compared. Carbon, particle size fractions, and EDTA extractable Cu, Mn, Zn, Ca and Mg were determined on 15 replicates of each procedure. Average content, standard deviation and coefficient of variation were calculated. The lowest average values of the above components are generally associated with the highest coefficient of variation. Average carbon and particle size contents obtained by the two subsampling methods were in very close agreement and not clearly in favour of either method. In the case of the EDTA extractable cations the relative efficiency of scooping increased over that of splitting as the clay content of the soils decreased from 38 to 1,5%.

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