oa African Zoology - The standardization of an apparatus for the mixing of soil samples for nematode extractions

Volume 13, Issue 2
  • ISSN : 1562-7020
  • E-ISSN: 2224-073X



Quantitative determination of nematode populations in soils frequently nesessitates the mixing of representative soil samples to form a homogeneous, compound sample from which the nematodes are extracted. A mixing apparatus was developed and standardized with the aid of a spectrophotometric technique by which the dispersion of a dye through the soil during mixing could be determined. It was found that the mixer is most suitable for use on sandy loam soils. Optimal mixing is obtained at a speed of 15 rpm for 2 minutes. Under these conditions mechanical damage to nematodes during mixing is minimal.

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