| Country : | Australia |
|---|
Assignment Task:
QUESTION 1
The climate and soils in many parts of New Zealand could be considered more suitable for certified organic agricultural production than in some areas of south-western Australia.
(i) Select a specific location in New Zealand and summarise information about the climate and soils of that location. Explain why it would be suitable for organic farming.
(ii) Suggest the potential constraints that would need to be overcome in order to establish certified organic farming at this location.
(iv) Design at least two specific experiments that could help sustain organic farming at this location (i.e. that could be used to help overcoming local constraints).
Include full details of references used.
QUESTION 2
Explain what is meant by a life-cycle assessment.
Explain how a life-cycle assessment could be used to determine any potential environmental limitations to certified organic milk production.
Your answer should include a critical analysis of the following:
(i) the factors that need to be investigated in this life-cycle assessment.
(ii) the time frame that should be used in this life-cycle assessment.
(iii) other information relevant to this life-cycle assessment.
Include full details of references used.
QUESTION 3
Select TWO published studies that demonstrate the potential for biological amendments to control plant disease(s) in organic farming systems.
Explain how the pathogen(s) cause damage to the plants investigated in each study.
(i) describe the experimental designs used in each study.
(ii) describe the characteristics of the biological amendments used as experimental treatments in each study.
(iii) explain whether or not the mechanisms involved in the control of the disease(s) were identified in each study.
(iv) explain potential constraints to disease control in organic farming systems for the pathogens investigated in each study.
Include full details of references used.
QUESTION 4
Explain the options available for supplying phosphorus in certified organic farming systems.
Explain constraints to phosphorus supply in organic systems that may be associated with soil characteristics and climate.
Your answer should include a critical analysis of the following points:
(i) variability in sources of phosphorus permitted by organic certification
(ii) the solubility characteristics of different sources of phosphorus
(iii) the potential for increasing the efficiency of use of phosphorus
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