21955 version 1
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Demonstrate knowledge of frosts, and frost protection methods for
viticulture
Level
4
Credits
5
Purpose
This unit standard is for people working in the viticulture industry. People
credited with this unit standard are able to: explain how climatic and landform
conditions cause radiation and advection frosts; demonstrate knowledge of
cultural methods for reducing frost risk in viticulture; describe the methods
available for frost prediction and monitoring; and describe the operation and
principles of frost protection methods.
Subfield
Horticulture
Domain
Viticulture
Status
Registered
Status date
25 September 2006
Date version published
25 September 2006
Planned review date
31 December 2011
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA, industry
and teaching professional in the same field from another
provider.
Standard setting body (SSB)
Primary Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0032
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
None.
Elements and performance criteria
Element 1
Explain how climatic and landform conditions cause radiation and advection frosts.
Performance criteria
 New Zealand Qualifications Authority 2016
21955 version 1
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1.1
The climatic and landform conditions that cause radiation frosts are described.
Range
1.2
relative humidity, dewpoint, aspect, airflow, topography and
surrounding land features.
The climatic and landform conditions that cause advection frosts are described.
Range
relative humidity, dewpoint, aspect, airflow and surrounding land
features.
Element 2
Demonstrate knowledge of cultural methods for reducing frost risk in viticulture.
Performance criteria
2.1
Factors that determine the frost risk of a site are identified and described.
Range
2.2
altitude, topography, surrounding land features, mesoclimate and
macroclimate.
Vineyard cultural practices that reduce the frost risk are identified and
described.
Element 3
Describe the methods available for frost prediction and monitoring.
Performance criteria
3.1
Frost prediction methods are described.
Range
3.2
local historical data, weather forecasts, meteorological information.
Frost monitoring methods are described.
Element 4
Describe the operation and principles of frost protection methods.
Performance criteria
4.1
The operation and principles of overhead sprinklers, including start up
procedures and requirements, are described.
Range
4.2
hydraulic
requirements,
temperature points.
protective
mechanisms,
critical
The operation and principles of air movement frost protection, including start up
requirements, are described.
 New Zealand Qualifications Authority 2016
21955 version 1
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Range
4.3
The operation and principles of heating methods for frost protection are
described.
Range
4.4
positioning within the vineyard, use with diesel heaters, protective
mechanisms, critical temperature points.
mobile gas fired units, frost pots, electrical methods.
Limitations of each method of frost protection are identified.
Range
type of frost event, severity of frost event, causes of failure,
maintenance, effective coverage, local authority regulations.
Please note
Providers must be accredited by the Qualifications Authority, or an inter-institutional body
with delegated authority for quality assurance, before they can report credits from
assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation www.primaryito.ac.nz if you
wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016