NTISthis.com

Evidence Guide: AHCSDT305A - 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!

From the Wiki University

 

AHCSDT305A - Perform a seed moisture test

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

Prepare for testing

  1. Submitted sample is checked to ensure it is in an intact, moisture-proof container with as much air as possible excluded.
  2. Appropriate apparatus are selected for seed moisture testing.
  3. Temperature of submitted sample in container is equilibrated to that of the testing laboratory.
  4. Exposure of sample to the atmosphere of the laboratory is reduced to an absolute minimum according to the species and ISTA requirements.
Submitted sample is checked to ensure it is in an intact, moisture-proof container with as much air as possible excluded.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate apparatus are selected for seed moisture testing.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Temperature of submitted sample in container is equilibrated to that of the testing laboratory.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Exposure of sample to the atmosphere of the laboratory is reduced to an absolute minimum according to the species and ISTA requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare samples for drying

  1. Submitted sample is thoroughly mixed.
  2. A minimum three subsamples are taken and combined to form a working sample of the required size.
  3. Exposure to air during sample reduction is limited to thirty seconds.
  4. Where cutting or grinding is required, one working sample is prepared so that two replicates can be drawn from the cut/ground material.
  5. Pre-drying is carried out where moisture content exceeds ISTA requirements.
  6. Containers and lids are weighed before and after filling.
  7. Weighing procedures conform with ISTA requirements and weight is expressed in grams to at least three decimal places.
  8. Lids are kept on containers until samples are placed in oven.
Submitted sample is thoroughly mixed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

A minimum three subsamples are taken and combined to form a working sample of the required size.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Exposure to air during sample reduction is limited to thirty seconds.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pre-drying is carried out where moisture content exceeds ISTA requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Containers and lids are weighed before and after filling.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Weighing procedures conform with ISTA requirements and weight is expressed in grams to at least three decimal places.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Lids are kept on containers until samples are placed in oven.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Dry and weigh sample

  1. Working sample is evenly distributed over surface of the container.
  2. Open containers and their lids are placed rapidly into an oven that is maintained at the required temperature for the species being tested.
  3. Drying period commences once oven returns to the required temperature after placement of containers.
  4. At the end of prescribed drying period, containers have their lids replaced before cooling to ambient temperature in desiccators.
  5. After cooling, the containers with lids and dried contents are weighed.
Working sample is evenly distributed over surface of the container.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Open containers and their lids are placed rapidly into an oven that is maintained at the required temperature for the species being tested.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Drying period commences once oven returns to the required temperature after placement of containers.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

At the end of prescribed drying period, containers have their lids replaced before cooling to ambient temperature in desiccators.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

After cooling, the containers with lids and dried contents are weighed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate results

  1. Moisture content is expressed as a percentage of the weight of the original sample.
  2. Result of test is reported according to enterprise guidelines.
Moisture content is expressed as a percentage of the weight of the original sample.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Result of test is reported according to enterprise guidelines.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this Unit

Evidence of the ability to:

preparing working samples

weighing containers and seed samples

calculating weights and percentages

cutting and grinding seeds

calculating and reporting results.

Context of and specific resources for assessment

Competency requires the application of work practices under work conditions. Selection and use of resources for some worksites may differ due to the regional or enterprise circumstances.

Method of assessment

This Unit should be assessed together with core Units and other Units of Competency relevant to the function or work role.

Guidance information for assessment

To ensure consistency of performance, competency should be demonstrated on more than one occasion over a period of time in order to cover a variety of circumstances, cases and responsibilities, and where possible, over a number of assessment activities.

Required Skills and Knowledge

Required skills include:

Ability to:

prepare working samples to ISTA rules

weigh containers and seed samples

calculate weights and percentages

cut and grind seeds

report results.

Required knowledge includes:

Knowledge of:

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

apparatus used in seed moisture testing

enterprise and/or legal traceability requirements

enterprise standard operating procedures (SOPs)

relevant health, safety and environment requirements.

Range Statement

The range statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Appropriate apparatus may include:

Grinding mill; electrically heated oven; containers with lids; a dessicator; a balance; sieves; and cutting tools.