Elective Study: Investigating Agriculture Through Research and Enterprise
Core concepts
The elective lets you pursue a focused agricultural investigation, enterprise or issue. Regardless of the chosen topic, examiners look for the same underlying skills: formulating a research question or enterprise goal; identifying variables; designing a valid and reliable method; collecting, presenting and analysing data; and drawing justified conclusions. You should be comfortable with experimental design concepts such as control groups, replication, randomisation, sampling technique and sources of error, and with interpreting tables and graphs.
For enterprise-based electives, show understanding of the production cycle, inputs, outputs, marketing, quality assurance and risk. For issue-based electives, such as sustainability, biotechnology or food security, present balanced evidence, distinguish fact from opinion, and evaluate social, economic and environmental impacts. Ethics, animal welfare and chemical use must be addressed where relevant.
Traps to watch
- Confusing correlation with causation when interpreting trial data.
- Describing a method without justifying why it controls bias.
- Presenting a conclusion that goes beyond the data collected.
- Ignoring sample size, replication or confounding variables.
Worked example
Rule of thumb: a treatment effect is only credible if it is larger than the variability within the control. Suppose a foliar fertiliser trial gives a mean yield of 5.2 tonnes per hectare treated and 4.9 tonnes untreated, but replicate plots vary by plus or minus 0.4 tonnes. The difference lies within the variation, so the honest conclusion is that no effect was demonstrated, and the recommendation is more replication.
Exam technique
Use the structure aim, method, results, discussion, conclusion, and explicitly link each conclusion back to the evidence you collected.