What agriculture areas can I create a module for?

Generally speaking, you could create a CAI module about any agronomic area. However, when thinking about creating a CAI module you should consider that there are 5 main areas that the Certified Crop Adviser (CCA) board grants continuing education units (CEU's) in:

Crop Management
Nutrient Management
Soil & Water Management
Integrated Pest Management
Professional Development

You should make sure whatever topic you choose will fit well into one of these categories before talking to your major professor about it.