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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare for a purity test
   • Identify samples, test methods and equipment to perform the test
   • Clean and calibrate equipment and working spaces
   • Prepare a working sample using mixing and dividing processes
   • Check and record sample details on worksheets and sample packets
2. Assess working samples
   • Separate the working sample into its component parts using appropriate equipment
   • Separate pure seed using visual characteristics, mechanical or pressure aids appropriate to the type of seed
   • Handle seeds carefully so as not impair their capacity for germination
   • Weigh separated component parts and matter to the number of decimal places required by enterprise guidelines
   • Identify contaminant seeds
3. Process and interpret data
   • Add and compare weights of all components’ parts with original working sample weight
   • Undertake a retest if required
   • Refer to a supervisor seeds that cannot be identified
   • Calculate the percentage weight of various component parts to one decimal place
   • Add percentages of all fractions together and round to 100%
   • Report results of test

Range Statement

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Performance Evidence

The candidate must be assessed on their ability to integrate and apply the performance requirements of this unit in a workplace setting. Performance must be demonstrated consistently over time and in a suitable range of contexts.

The candidate must provide evidence that they can:

prepare a working sample

report percentages of component parts

round off calculations to enterprise requirements

separate a working sample into component parts

test the analytical purity of seed to infer the composition of a seed lot

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Knowledge Evidence

The candidate must demonstrate knowledge of:

enterprise and/or legal traceability requirements

enterprise standard operating procedures (SOPs)

materials and apparatus used in seed purity tests

relevant work health, safety and environment requirements

seed biology

seed identification

the role of the International Seed Testing Association (ISTA) and the ISTA Rules for Seed Testing

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