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Evidence Guide: AHCSDT411 - Perform a 1000 seed weight 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!

From the Wiki University

 

AHCSDT411 - Perform a 1000 seed weight test

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

Prepare a working sample

  1. Obtain pure seed following a purity analysis or as a representative fraction of a submitted sample
  2. Use mechanical dividers where appropriate
  3. Maintain moisture content of working sample before counting through storing it in moisture-proof containers
  4. Complete labelling and records
Obtain pure seed following a purity analysis or as a representative fraction of a submitted sample

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Use mechanical dividers where appropriate

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Maintain moisture content of working sample before counting through storing it in moisture-proof containers

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Complete labelling and records

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Count and weigh seed by machine

  1. Put the entire working sample through a counting machine and record the total number of seeds indicated
  2. Weigh working sample to the required number of decimal places
Put the entire working sample through a counting machine and record the total number of seeds indicated

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Weigh working sample to the required number of decimal places

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Count and weigh replicates by hand

  1. Count out eight replicates of 100 seeds randomly from the working sample
  2. Weigh each replicate to the required number of decimal places
  3. Record weights of each replicate
  4. Calculate variance, standard deviation and coefficient of variance
  5. Test a new set of replicates where the coefficient of variance exceeds the prescribed value
  6. Determine the average weight of 1000 seeds where the coefficient of variance does not exceed the prescribed value
Count out eight replicates of 100 seeds randomly from the working sample

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Weigh each replicate to the required number of decimal places

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Record weights of each replicate

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate variance, standard deviation and coefficient of variance

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Test a new set of replicates where the coefficient of variance exceeds the prescribed value

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Determine the average weight of 1000 seeds where the coefficient of variance does not exceed the prescribed value

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report results

  1. Report results of weight determination under "other determinations" to the prescribed number of decimal places
  2. Report the method used and the results calculated
Report results of weight determination under "other determinations" to the prescribed number of decimal places

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Report the method used and the results calculated

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 a working sample

1.1 Obtain pure seed following a purity analysis or as a representative fraction of a submitted sample

1.2 Use mechanical dividers where appropriate

1.3 Maintain moisture content of working sample before counting through storing it in moisture-proof containers

1.4 Complete labelling and records

2. Count and weigh seed by machine

2.1 Put the entire working sample through a counting machine and record the total number of seeds indicated

2.2 Weigh working sample to the required number of decimal places

3. Count and weigh replicates by hand

3.1 Count out eight replicates of 100 seeds randomly from the working sample

3.2 Weigh each replicate to the required number of decimal places

3.3 Record weights of each replicate

3.4 Calculate variance, standard deviation and coefficient of variance

3.5 Test a new set of replicates where the coefficient of variance exceeds the prescribed value

3.6 Determine the average weight of 1000 seeds where the coefficient of variance does not exceed the prescribed value

4. Report results

4.1 Report results of weight determination under "other determinations" to the prescribed number of decimal places

4.2 Report the method used and the results calculated

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 a working sample

1.1 Obtain pure seed following a purity analysis or as a representative fraction of a submitted sample

1.2 Use mechanical dividers where appropriate

1.3 Maintain moisture content of working sample before counting through storing it in moisture-proof containers

1.4 Complete labelling and records

2. Count and weigh seed by machine

2.1 Put the entire working sample through a counting machine and record the total number of seeds indicated

2.2 Weigh working sample to the required number of decimal places

3. Count and weigh replicates by hand

3.1 Count out eight replicates of 100 seeds randomly from the working sample

3.2 Weigh each replicate to the required number of decimal places

3.3 Record weights of each replicate

3.4 Calculate variance, standard deviation and coefficient of variance

3.5 Test a new set of replicates where the coefficient of variance exceeds the prescribed value

3.6 Determine the average weight of 1000 seeds where the coefficient of variance does not exceed the prescribed value

4. Report results

4.1 Report results of weight determination under "other determinations" to the prescribed number of decimal places

4.2 Report the method used and the results calculated

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 variance, standard deviation and coefficient of variance

determine the weight per 1000 pure seeds from a submitted sample

prepare and weigh replicates

report results

The candidate must demonstrate knowledge of:

apparatus for weighing, counting and dividing seed samples

calculations such as variance, standard deviation and coefficient of variance

concepts of metrology

enterprise standard operating procedures (SOPs)

relevant health, safety and environment requirements

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

seed biology

Range Statement