Turtle wheat searching!

Hello!
i recently started a wheat farm as part of my factory in tekkit 1.6.4, i have a very fancy design with zigzags and such and so i wanted to use a farming turtle to break amy wheat and replace it for me! the only problem is..I have no idea how to make the turtle search for specific blocks and plant directly after breaking it! :(/> help please!

I'm not sure if this would work on wheat, but turtle.compare

It wouldn't work. There isn't anything you could use in that version. The latest version's turtle.inspect call would probably let you do this.

The general alternative approach is to have the turtle assume that any block under it is fully grown wheat, which it should dig up then reharvest. Have it wait about an hour in between laps of the field, or less if you've got some growing agents speeding things along.