Experiments start with a question. As a team, you will need to identify at least 3 questions that you could potentially answer with an experiment. You'll then develop those experiments, and ultimately conduct them.
Use the information and conditions established in your pilot experiment to determine appropriate “standard” conditions for your main experiments and to address your overall causal question.
I can procure a fairly wide range of different supplies for your main experiments. The cost of these materials comes from our course budget – please do not pay out of pocket for supplies. You must get a supply list to me as soon as possible, including the total amounts needed, to ensure that I can get your materials to you with enough time to complete your experiments. Here are a couple of ideas for types of supplies to consider, but do not let these ideas limit your imagination.
Additional plant species: Radishes, pumpkins, sunflowers, rye, cowpeas, and more...
Liquid fertilizer
Sand
Potting soil
Limited number of plant grow lights
You may discover that it is simpler to have each individual specialize on one main experiment, rather than having every team member participate equally in every main experiment. That said, other logistical approaches are certainly possible. This is something that your team will want to consider in planning the main experiments.
Regardless, the team will need to think carefully about how many times each experiment will need to be replicated to have adequate sample sizes. You'll also need to communicate effectively about how the experiment was carried out, how data were collected, and what the quantitative measurements represent. Finally, be sure to think about and include good control treatments each time an experiment is conducted – including adequate replication of the control treatments!