Lime-Dolomite-Gypsum & Compost Sampling Instructions
Correct sampling is imperative to ensure accurate analysis and interpretation. When sampling lime, dolomite, gypsum or compost it is important to obtain a representative sample.

Due to the variability within a stockpile or windrow of material, the sample must be composed of a series of subsamples which is then combined and reduced to obtain a representative sample.

Things to avoid when sampling

  • Temperature fluctuations: Samples taken from active stockpiles can change rapidly because of the dynamics of microbial activity in composts

Taking the sample

  • Calculate the number of subsamples required and recommended size of subsamples relative to particle size
  • Take subsamples using a spade or trowel, taking subsamples from random positions throughout the pile
  • Arrange for the pile or windrow to be turned, screened or completely homogenized on the day that the sample is taken, breaking up and distributing any clumps
  • For a windrow or pile that has not being turned or screened (homogenised), use a frontend loader to dig or back-blade halfway into the pile to expose a cross section. Take subsamples scattered over the width and height of cross-section
  • Combine the samples and blend into a composite sample. The lab requires 500 grams of your representative sample

Sending the sample to the lab

Deliver to:

Adelaide
Mail
PO BOX 155
Welland SA 5007
Courier
Unit 3, 11 Ridley St
Hindmarsh SA 5007
Perth
Mail
PO BOX 174
Belmont WA 6984
Courier
Unit 4, 158 Fransisco St
Belmont WA 6104

For any further information please contact APAL on 08 8332 0199 or info@apal.com.au

Downloads

A more detailed sampling guide is available below.

Sampling Guidelines

Updated version coming soon, please contact office for information.

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