How do I configure a multifarm from forestry to make one sector wheat, one sugar canes, one potatoes and one carrots. the circuit board is 2 crops 2 vegetables but how do i configure it to assign one thing to a certain area, just putting in the things makes it all mixed.
An automatic mode ("managed") multifarm can't do precisely what you're looking at. Yes, you can configure a sector to be a vegetable farm or a crop farm; but, all vegetable farm sectors and all crop farm sectors will be managed as one. In other words, you split your farm 50/50 with that setup. The multifarm sees two vegetable areas and just starts filling them both up with the first available vegetable in its seed slot. This is also the reason why you cannot have more than one type of tree in an arboretum, for instance, because the arboretum is also exclusive to the managed mode multifarm type. SirSengir originally intended to improve on this but then got fed up by community drama and essentially left modding to create his own game. Thankfully Forestry development is seeing some revival for 1.7.10 so there may be improvements coming.
In the meantime, you can use a "manual" mode multifarm. You do this by selecting the appropriate mode in the soldering iron while preparing the circuit board. Thankfully, all the produce types you want are also available in manual mode. In fact, sugar cane is
only available in manual mode, so there's that too
The thing about manual mode is that the farm will not plant anything itself... but it
will havest automatically, and it
will replant automatically (another way to look at it is that manual mode multifarms are pretty much the same as a MFR farm, while the managed mode is unique to multifarms). This means that if you have your two vegetable fields, you plant them once yourself, with exactly the number of potatoes and carrots you want. You don't have to worry about where one vegetable field ends and the other starts, you can mix and match freely. Plant a checkerboard pattern if you like, that works too. When the potato or carrot is ripe, the multifarm will harvest it and replant the exact thing it just harvested in the exact same spot, provided it has the required item in its seed inventory. It still cannot tell apart one vegetable field from another, but it can preserve the pattern you yourself have set up manually.
Make sure the farm's seed buffer contains one stack of carrots, one stack of potatoes and one stack of wheat seeds. Block the other three slots up with dirt, no need to provide sugar cane (the reed farm will only chop the top off, it will never remove and replant the sugar cane plant). The farm will keep its seed inventory topped up and forward anything else to the output slots.
