Disk versus Cultivator -- best uses?

Is the disk better for soil prep the first time each season (the heavy work), and the spring cultivator better for light cultivation of weeds as the plants grow?

Seems that I can get the disk only about 8" deep but the cultivator will go much deeper in the soil, but I'm not sure that is how it was intended.

What is the best or right use for each?

thanks,
Tom

One area you should refrain from using disc is where weeds like couch or quack grass or any other weeds that spread by cutting off roots. By that I mean every time you cut that root you create a new plant. It is much better to use a cultivator in this situation as cultivator tends to pull those long roots out leaving them on surface to fry in the sun.

The cultivator has been long recognized as a much better leveling harrow, used in the final passes before seeding. One of the down falls of cultivators is they are quite effective finding rocks and stones. Great if you like picking rocks or if you really want to clean up those rocks and be rid of them for awhile. Cultivators of course also can be equiped with points or sweeps depending on function. Sweeps work well on anual broadleaf weeds as you can set them very shallow. thus shearing those weeds near surface and not disturbing soil at much depth bringing new weed seeds close enough to surface to germinate. I like the sweeps for row cultivation.

I don't know as I covered it all, others will have good suggestions. As you use these and you will have some suggestions of your own.