Can I use dispensers or droppers to auto-replant crops?

I'm working on a fully-automatic farm now that 1.5 is out. The plan is to use redstone to flush fully-grown crops into a channel to be collected by a hopper and then picked up by a cart. The issue I've ran into, however, is that seeds do no seem to be planted by dispensers or droppers. The wiki says bone meal can be used on growing crops from dispensers, but is it possible to plant the crops from either device?

This is my current setup:

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4 Answers

In vanilla Minecraft, wheat, carrots, and potatoes must be planted by hand, although they can be automatically harvested with water or pistons.

You might be able to get the functionality you want with a mod, but I don't know of any. Sorry!

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No, dispenser nor droppers can plant seeds. However, as an alternative you can put a villager farmer there and he will automatically plant seeds.

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As of Minecraft 1.8, it is possible to make automatically replant crops using farmer villagers, see How can I make my farmer villager replant crops? (1.8)

You can use

/fill xyz xyz minecraft:carrots 

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