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Evidence Guide: AHCSDT305 - Perform a seed moisture test

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

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AHCSDT305 - Perform a seed moisture test

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare for testing

  1. Check submitted sample is in an intact, moisture-proof container with as much air as possible excluded
  2. Select appropriate apparatus for seed moisture testing
  3. Equilibrate temperature of submitted sample to that of the testing laboratory
  4. Reduce exposure of sample to the atmosphere of the laboratory to an absolute minimum, according to the species and ISTA requirements
Check submitted sample is in an intact, moisture-proof container with as much air as possible excluded

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select appropriate apparatus for seed moisture testing

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Equilibrate temperature of submitted sample to that of the testing laboratory

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Reduce exposure of sample to the atmosphere of the laboratory to an absolute minimum, according to the species and ISTA requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare samples for drying

  1. Mix submitted sample thoroughly
  2. Take a minimum of three subsamples and combine to form a working sample of the required size
  3. Limit exposure to air to thirty seconds during sample reduction
  4. Where cutting or grinding is required, prepare one working sample so that two replicates can be drawn from the cut/ground material
  5. Undertake pre-drying where moisture content exceeds International Seed Testing Association (ISTA) requirements
  6. Weigh containers and lids before and after filling
  7. Ensure weighing procedures conform with ISTA requirements and express weight in grams to at least three decimal places
  8. Keep lids on containers until samples are placed in oven
Mix submitted sample thoroughly

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Take a minimum of three subsamples and combine to form a working sample of the required size

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Limit exposure to air to thirty seconds during sample reduction

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Where cutting or grinding is required, prepare one working sample so that two replicates can be drawn from the cut/ground material

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Undertake pre-drying where moisture content exceeds International Seed Testing Association (ISTA) requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Weigh containers and lids before and after filling

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Ensure weighing procedures conform with ISTA requirements and express weight in grams to at least three decimal places

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Keep lids on containers until samples are placed in oven

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Dry and weigh sample

  1. Distribute working sample evenly over the surface of the container
  2. Rapidly place open containers and their lids into an oven maintained at the required temperature for the species being tested
  3. Commence drying period once oven returns to the required temperature after placement of containers
  4. Replace lids before cooling to ambient temperature in desiccators at the end of prescribed drying period
  5. Weigh the containers with lids and dried contents after cooling
Distribute working sample evenly over the surface of the container

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Rapidly place open containers and their lids into an oven maintained at the required temperature for the species being tested

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Commence drying period once oven returns to the required temperature after placement of containers

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Replace lids before cooling to ambient temperature in desiccators at the end of prescribed drying period

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Weigh the containers with lids and dried contents after cooling

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate results

  1. Express moisture content as a percentage of the weight of the original sample
  2. Report result of test
Express moisture content as a percentage of the weight of the original sample

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Report result of test

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Element

Performance criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare for testing

1.1 Check submitted sample is in an intact, moisture-proof container with as much air as possible excluded

1.2 Select appropriate apparatus for seed moisture testing

1.3 Equilibrate temperature of submitted sample to that of the testing laboratory

1.4 Reduce exposure of sample to the atmosphere of the laboratory to an absolute minimum, according to the species and ISTA requirements

2. Prepare samples for drying

2.1 Mix submitted sample thoroughly

2.2 Take a minimum of three subsamples and combine to form a working sample of the required size

2.3 Limit exposure to air to thirty seconds during sample reduction

2.4 Where cutting or grinding is required, prepare one working sample so that two replicates can be drawn from the cut/ground material

2.5 Undertake pre-drying where moisture content exceeds International Seed Testing Association (ISTA) requirements

2.6 Weigh containers and lids before and after filling

2.7 Ensure weighing procedures conform with ISTA requirements and express weight in grams to at least three decimal places

2.8 Keep lids on containers until samples are placed in oven

3. Dry and weigh sample

3.1 Distribute working sample evenly over the surface of the container

3.2 Rapidly place open containers and their lids into an oven maintained at the required temperature for the species being tested

3.3 Commence drying period once oven returns to the required temperature after placement of containers

3.4 Replace lids before cooling to ambient temperature in desiccators at the end of prescribed drying period

3.5 Weigh the containers with lids and dried contents after cooling

4. Calculate results

4.1 Express moisture content as a percentage of the weight of the original sample

4.2 Report result of test

Required Skills and Knowledge

Element

Performance criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Prepare for testing

1.1 Check submitted sample is in an intact, moisture-proof container with as much air as possible excluded

1.2 Select appropriate apparatus for seed moisture testing

1.3 Equilibrate temperature of submitted sample to that of the testing laboratory

1.4 Reduce exposure of sample to the atmosphere of the laboratory to an absolute minimum, according to the species and ISTA requirements

2. Prepare samples for drying

2.1 Mix submitted sample thoroughly

2.2 Take a minimum of three subsamples and combine to form a working sample of the required size

2.3 Limit exposure to air to thirty seconds during sample reduction

2.4 Where cutting or grinding is required, prepare one working sample so that two replicates can be drawn from the cut/ground material

2.5 Undertake pre-drying where moisture content exceeds International Seed Testing Association (ISTA) requirements

2.6 Weigh containers and lids before and after filling

2.7 Ensure weighing procedures conform with ISTA requirements and express weight in grams to at least three decimal places

2.8 Keep lids on containers until samples are placed in oven

3. Dry and weigh sample

3.1 Distribute working sample evenly over the surface of the container

3.2 Rapidly place open containers and their lids into an oven maintained at the required temperature for the species being tested

3.3 Commence drying period once oven returns to the required temperature after placement of containers

3.4 Replace lids before cooling to ambient temperature in desiccators at the end of prescribed drying period

3.5 Weigh the containers with lids and dried contents after cooling

4. Calculate results

4.1 Express moisture content as a percentage of the weight of the original sample

4.2 Report result of test

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:

calculate weights and percentages

cut and grind seeds

determine the moisture content of seeds for routine use by an oven method

prepare working samples

weigh containers and seed samples

calculate and report results

The candidate must demonstrate knowledge of:

apparatus used in seed moisture testing

enterprise and/or legal traceability requirements

enterprise standard operating procedures (SOPs)

relevant health, safety and environment requirements

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

Range Statement