Well, I only have experience with about an 18m^2 garden, so I'll copy an excerpt from my MOFGA link: > Dutch white [clover] forms a low, dense understory that

Well, I only have experience with about an 18m^2 garden, so I'll copy an excerpt from my MOFGA link: > Dutch white [clover] forms a low, dense understory that controls weeds, fixes nitrogen in the soil and remains as a cover crop after the grain harvest. So the clover doesn't compete directly with the wheat, which grows much taller, and it also fixes beneficial nitrogen in the soil for future growth, and the clover helps to prevent other weeds which will compete with the wheat. That's my understanding at least. As for tillage, I believe it levels the playing field, giving one's desired seeded crop an advantage over any established weeds. This PennState article has a good overview: https://extension.psu.edu/an-introduction-to-weed-management-for-conservation-tillage-systems https://extension.psu.edu/an-introduction-to-weed-management...