It also depends on what you grow. For some crops there is no problems with slugs. In Austria temperate cold climate one man grows various crops with no till, hectares of land. Manfred Wenz has successfully developed no-till techniques for direct seeding of commercial grain crops, all while building up the vitality and organic matter of his soil.
http://www.goveganic.net/article204.html
Also take a look at videos on youtube with similar tactics:
https://www.youtube.com/watch?v=nWXCLVCJWTU
https://www.youtube.com/watch?v=fkMB5meXMGg
https://www.youtube.com/watch?v=hOGzjWJ1kqs
In my opinion, gardeners will take care of food for future, real food – grains aren’t really good food for humans. Anyway, i grew this way on smaler scale alsowith various veggies, no slug problem here, so it worked eventhou it’s damp climate.