10) Silk Farming (cultivating silk worms) 11) Plantation or Tree Farming (long term development of timber) 12) Extensive Pastoral Farming (eg Hill Sheep Farming) You could argue that fish farming should be in the list, but that is generally considered to be a separate category.
Chromexcel is registered trademark for a kind of aniline leather with a history of production that goes back over a century in the US.
Chromexcel is specific to Horween. It is calf leather, but it is chrome tanned first then vegetable retanned (like cordovan). It creates a very durable, beautiful pull-up leather due to the vegetable retanning. Vegetable tanning also is more resistant to bacteria, and fungus and creates a more durable process, whereas chrome tanning creates a much more flexible, and stretchy kind of leather. Chromexcel you get the best of both worlds.