Question 1

What is NCEA AS 91291 about?

Accepted Answer

This internal standard (assessed by your teacher, not an exam) is worth 4 credits and is all about how plants are grown commercially in New Zealand using advanced techniques. You need to show you understand methods like grafting, budding, hormone-treated cuttings, tissue culture, and sexual propagation (growing from seed), and explain why these methods are used in real commercial horticulture and agriculture.

Question 2

What do students need to do for AS 91291?

Accepted Answer

1. Learn about advanced plant propagation techniques: grafting, budding, hormone-treated cuttings, tissue culture, and sexual propagation (seeds). 2. Describe the steps involved in carrying out these techniques. 3. Explain how and why each step works — linking to plant biology (e.g. how roots form, what hormones do, how grafts join). 4. Compare or evaluate techniques — for example, discussing which method gives better quality plants, produces more plants, preserves genetics, suits a particular time of year, or makes the most economic sense for a commercial grower. 5. Complete internal assessments set and marked by your teacher, which could include written reports, practical work, or a combination.

Question 3

What's the difference between Achieved, Merit, and Excellence for AS 91291?

Accepted Answer

Achieved: You can correctly describe the steps involved in one or more advanced propagation techniques. You show you know what is done and in what order. Merit: You explain how and why the steps or techniques work — for example, why rooting hormone is applied, how a graft union forms, or what conditions help cuttings survive. You connect your answers to plant science concepts or plant structures. Excellence: You evaluate and compare techniques — for example, you might compare grafting vs cuttings for a specific crop, discussing trade-offs around plant quality, the number of plants produced, keeping genetic traits consistent, best timing, and cost to a commercial business. Your answer is well-reasoned and shows a full picture of why a grower would choose one method over another.

Question 4

What mistakes do students typically make in AS 91291?

Accepted Answer

1. Only describing what is done without explaining why steps are important or how they work — this keeps students at Achieved rather than Merit. 2. Mentioning plant science terms (like 'cambium' or 'rooting hormone') without actually explaining their role in making propagation successful. 3. For Excellence, making comparisons that are vague or one-sided — students need to discuss multiple factors such as quality, quantity, genetics, timing, and economics rather than just one. 4. Confusing asexual and sexual propagation, or mixing up which technique produces genetically identical plants and which does not. 5. Not linking the technique to a real commercial context in New Zealand — the standard specifically requires this connection to commercial production.

Plant propagation

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