I've farmed my whole life. No-Till is nothing new. I'll try to keep this short, as I have first hand experience with both conventional till, and no-till. My family progressed with farming like everyone did in the late 70's and early 80's when chemical started to come into play. We eventually went no-till and to say the least, it didn't work for us. Partly because granddad didn't know or understand how to do it. We eventually went the polar and complete opposite, going to 100% organic farming. No chemical whatsoever..... so we basically went back to farming like they did 50 years ago. We never did raise the bushels per acre that the chemical farmers did. Now, moving ahead a few years, I worked for a farmer that was 100% no-till. He was completely successful at it, raising some of the best crops I had seen. So, yes it can be done. Now I help some of my cousins farm. They run right down the middle. We no-till the beans, and till all the corn ground, so the soil gets worked every other year. My granddad actually did studies on his farm with the U of I (University of Illinois) AG department on different tillage types and the results. So.... yeah... I've seen a lot of different methods. My opinion, and that is all it is, because everyone has different results. See, there are too many factors to be able to establish a "rule". Soil type, size of equipment, rain (weather), seed brand/type/(and like 5 factors within each of those), seed spacing, plants per acre, all play a part in the successfulness of the crop. My opinion is: Tillage plays an important role. I have seen first hand in the same field, side by side crops all of the same seed, just different tillage methods applies, and the crops look darker green, and just all around more hearty than the ones that didn't get as much tillage. Then, as far as chemical usage, I believe it has it's place as well. So does cultivating crops (tillage post-emergence). This is a debate that will never end because farming depends on so much more than it looks like from the outside.
In a garden:
Unless you plan on using Round-Up ready sweetcorn in your garden, your going to need to till. If you decide to go no-till in the garden, your going to need a lot of mulch or something similar to control weeds. After all I've done and seen, I will plow my garden every year. In the spring or in the fall really doesn't seem to matter. Then I will till and plant. This leaves the soil soft so my cultivator will go in. I have too big of a garden to be able to weed by hand (hoe). If you have a small garden, can mulch or cover the soil, then it may work for you. The neat thing is, it's trial and error. It may work for you. It may not. I'm convinced about what I've seen, and I'll keep my plow, tiller, and cultivators.
Read these for some reference. I shared some stuff you may find interesting in the second link.
http://www.onlycubcadets.net/forum/s...ad.php?t=39111
http://www.onlycubcadets.net/forum/s...ad.php?t=32529
http://www.onlycubcadets.net/forum/s...ad.php?t=33055