We ended up side-tracking to another subject. Leveling rough ground. That's where the subject of tillage equipment came back into the topic. On the ORIGINAL topic of weed control, I don't see where we "are back to recommending ploughs or disc's".
I started farming in the early 70's. Times were changing. (As the ALWAYS ARE) By the early to mid 80's phrases like "minimum tillage" and "no-till" were solidly implanted into to AG scene. I resisted making the change even though I realized early on that was the way of the future. My operation was small time. I didn't want to make a huge investment in equipment for relatively small acreage, and also I was considering just how many more years I'd be "in the game". It's been ALMOST 3 years now since I sold the farm and quit putting out a crop. My decision to lay down the plow and quit farming was two fold. I got an offer on my land that was simply impossible to ignore, AND, my farming practices were just too outdated to turn a profit. Fuel cost, taxes, equipment needs, fertilizer cost, ect, were too much for old school farming on a small scale.
Heavy tillage takes time, fuel, big equipment, and therefore, M.O.N.E.Y. ..... OVERHEAD......
The best results AND the lowest overhead is with reduced or eliminated tillage, and chemical weed control. Even with my old ways, chemical weed control was the most efficient, least costly, and most PROFITABLE way to get the job done. When I started, I would cultivate corn 2, sometimes 3 times per year. The last corn crop I grew, I planted RoundUp Ready corn. I plowed and disced, then planted. A week or 10 days later, I had a hired spray contractor hit the fields with RoundUp. Then I'd just stand back and watch it grow.