Study questions
- Analyse the data for percentage emergence in CS15Data2 and verify that there are no significant effects on emergence for any of the factors.
Sometimes the arc sign transformation is used for the analysis of percentage data.
Explain why this is not necessary here. Had there been a difference in emergence rate
between Umtata and Kranskop suggest how you might deal with this in the analysis of yield.
- Write a report to summarise in fewer than 50 words the results displayed in the table shown under Reporting.
- Total grain yield was higher in this experiment for Umtata than for Kranskop. This was opposite to the difference in total biomass.
Taking into consideration the determinate and indeterminate natures of the two cultivars suggest reasons for this.
- Discuss how the poorer harvest index of Kranskop compared with Umtata may be related to the late planting date.
Taking into account the conclusions that have been drawn in this experiment design a follow-up experiment at a more
suitable planting time that can yield more information on the suitability of different cultivars in the Pietermaritzburg environment.
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