Grain Sampling Instructions

The challenge in grain sampling is to obtain a representative sample that will accurately reflect the characteristics of the whole bulk.
The best opportunity to do this is during the filling of your store as this allows for regular incremental samples to be taken from each load. This forms one aggregate sample from which a final representative buyer sample can be prepared. These can then be picked up by our grain collectors and taken for analysis.
The test results obtained from these samples will better represent the bulk than those obtained by spearing heaps. This means you will have a better understanding of the variability of your grain, which will aid you in making your marketing decisions and help ensure that your grain meets contract specifications.

General Guidelines

  • Follow the AHDB Grain Sampling Guide - Click here to view the AHDB guide
  • Prepare one aggregate sample for approximately every 50T milling wheat and malting barley, and one aggregate sample for approximately every 100T for feed wheat/barley and other commodities
  • Ideally two ~500g incremental samples should be taken from each trailer tipping into store (¼ and ¾ through the load). Air drying of the resultant aggregate sample may be required prior to preparing the buyers representative samples if over 16% moisture
  • Alternatively, ~250g incremental samples should be taken every 10T from the cleaner or drier outlet
  • Although not recommended, if you do decide to sample from the heap, at least 15 incremental samples should be taken evenly over the area representing no more than 50T or 100T as appropriate
  • A 2 metre, multi-aperture, sequential opening grain spear should be used
  • Resultant aggregate samples (often 3-10kg) must be mixed well before preparing the buyers’ representative samples for analysis (see HGCA guidelines)
  • Sample bags should be filled to the top, the air expelled and sealed tightly.

Notes on completion of Frontier grain sample bags

Complete the coloured area of the sample bag fully, giving as much detail as possible including:

  • Account name and number
  • Frontier account address
  • Frontier Farm Trader
  • Sample date
  • Sampled by - 'tick' farmer
  • Commodity and variety  (essential for all wheat, barley, oats, rye and pulses)
  • Tonnage sample represents
  • Grain location (see notes on sample locations below)
  • Other information - anything releavtn, esepcially from a food safety perspective. Keep concise.

Sample Locations

A standard method for describing the location of grain on farms is necessary to allow easy identification during marketing discussions. Three pieces of information need to be established:

  1.  FARM WHERE STORED - farm where bulk is located - e.g. Elm Farm
  2.  STORE IDENTITY - identify where on the farm the bulk is stored - e.g. Black barn
  3.  LOCATION IN STORE - the location of the sample within the bulk.

Grain Location in Flat Stores




Use the bays as markers numbering from the back (or first filled end of the store). Also, left, right (and middle in a large store)

e.g. In the Black barn at Elm Farm

Bay 1 left should be labelled on the sample bag as:Elm Fm/Black Barn/1LBay

Bay 3 right should be labelled on the sample bag as:Elm Fm/Black Barn/3R.


Grain Location in Bins

  • If the bins are numbered on the farm, use existing bin numbers
  • If bins are not numbered - number from the back towards the point of entry and/or from left to right. Please see examples below.

Indoor Bins



E.g. Indoor bins at Elm Farm

First bin on the left should be labelled on the sample bag as Elm fm/Indoor bin/1L




Outdoor Bins

 Grain-Marketing-Grain-Sampling-InstructionsE.g. In outdoor bins at Elm Farm

Third bin from the left should be labelled as Elm Fm/Outside Bin 3

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