Hey Erik,
Regarding mulch on a large scale - This is why you want to do cover cropping - like Nature does. It acts as living mulch and as "soil armor". If you let the crop debris lay where it falls after harvest, you have additional mulch which will degrade within a month or so, if your soil biology is healthy. This returns the nutrients used to grow it back to the soil, just like nature does in a healthy ecosystem. With a super diverse cover crop seed mix, you will always have some species covering your land, no matter what climate changes you have. Check out this video by Elaine Ingham - she lays it out really quickly in this one. Of course, there is much more detail to what she's talking about, but this is a very succinct version that gives a good overview.
I would also recommend Elaine's "the roots of your profits" video and any other lectures of hers that you can find on Vimeo and YouTube, as well as her free mini course on soilfoodweb.com. Also check out Gabe Brown and Greg Judy's talks - They're all advocating the same thing from slightly different angles. The principles of putting the soil first and how to do that are the same though. You'll find that Joel Salatin, Geoff Lawton and others are talking about the same process. Who knew that soil science could be so exciting? The soil is as dynamic an ecosystem as a tropical reef once you get into studying it.
Thanks soil scientists, permies and farmers who've pioneered these ideas, we actually have the tools to reverse the damage that Totalitarian Agriculture has done over the last 10,000 years...and the humble
compost pile is the nexus of that change, because it's the analog of the forest floor where decay happens and soil is created. It's all about mimicking Mother Nature in the end, so why reinvent the wheel that's been around for 4.5 billion years? That's the Fool's Errand that the Big Ag corps want to sell us.