After seeing a few people post their Lua/CC scripts, I figured I'd add a few of mine to the repository.

Everything you need to know is in the code's comments

--[[
    WheatFarm.lua by SReject
    2014 All Rights Reserved

    Usage:
        While seeds, bone meal and valid soil are available, the turtle will plant
        the seeds, apply bone meal, then harvest the wheat

    Setup:
        Turtle: Farming (Turtle + Hoe in crafting bench)
        Input: Applicatable inventory below turtle for bonemeal input
        Output: Applicatable inventory above turtle for wheat and extra seeds
        Other: Tilled & watered soil in front but lowered one block from the turtle

    Starting:
        Place seeds in the first(top-left) slot of turtle.
        Place bone meal in the inventory below the turtle
        Execute the script/program
]]--

--[[
    emptyInventory:
        Arguments:
            forceEmpty (Boolean) - If true, forces the turtle to empty its inventory

        Does:
            Empties Turtle's inventory except the first slot(seeds) and second slot(bonemeal)
]]--
function emptyInventory(forceEmpty)

    -- Check if the turtle's inventory is full or the emptying should be forced
    if (turtle.getItemCount(16) > 0 or forceEmpty == true) then

        -- Refill seeds in slot#1
        refillSeeds(true)

        -- Loop to check each slot, 3 through 16, of the turtle's inventory
        for n = 3, 16, 1 do

            -- check if there's items in the slot
            if (turtle.getItemCount(n) > 0) then

                -- select the turtle's inventory slot, and 'dropUp()' (Place in the inventory above the turtle)
                turtle.select(n)
                turtle.dropUp()
            end
        end

    -- Otherwise, refillSeeds
    else
        refillSeeds(false)
    end
end

--[[
    refillSeeds:
        Arguments:
            forceRefill (boolean) - If true, forces the turtle to refill seeds

        Does:
            Refills the first slot of the turtle with seeds from else where in the turtle's inventory
]]--
function refillSeeds(forceRefill)

    --[[ Variables:
        seedCount: number of seeds in slot#1
        refillCount: number of seeds required to refill slot#1 ]]
    local seedCount, refillCount = turtle.getItemCount(1), 0
    refillCount = 64 - seedCount

    -- Check if there's no seeds in slot #1
    if (seedCount == 0) then

        -- Print the turtle is out of seeds
        print("Out of seeds: place seeds in first slot to continue")

        -- Wait for seeds
        repeat
            sleep(1)
        until (turtle.getItemCount(1) > 0)

    -- Check if the turtle needs to refill seeds or the 'forceRefill' argument is true
    elseif (seedCount < 16) or (forceRefill == true and seedCount < 64)  then

        -- select the first slot
        turtle.select(1)

        -- loop over slots #3 through #16
        for n = 3, 16, 1 do

            -- check if the slot looped over contains seeds
            if (turtle.compareTo(n) == true) then

                -- Select the looped over slot
                turtle.select(n)

                -- If there's not enough seeds to completely refill slot#1
                if (refillCount > turtle.getItemCount(n)) then

                    -- transfer the seeds to slot one
                    turtle.transferTo(1, turtle.getItemCount(n))

                    -- Adjust refillCount
                    refillCount = 64 - turtle.getItemCount(1)

                -- If there's more than enough seeds in the looped over slot to refill slot#1
                else

                    -- transfer enough seeds to fill slot#1 then exit the loop
                    turtle.transferTo(1, refillCount)
                    break
                end

                -- select slot#1 for the next literation of the loop
                turtle.select(1)
            end
        end
    end
end

--[[
    getBoneMeal
        Arguments:
            none
        Usage:
            Refills slot#2 with bone meal from an inventory directly below the turtle
]]
function getBoneMeal()

    -- select the turtle's second inventory slot
    turtle.select(2)

    -- Check to see if the turtle needs more bonemeal
    if (turtle.getItemCount(2) <= 8) then

        -- Attempt to retrieve bone meal from inventory below the turtle
        if (turtle.suckDown() == false) then

            -- Print the turtle is out of bone meal and waiting
            print("Out of bonemeal, waiting...")

            -- Wait for bone meal to be placed in inventory below the turtle
            repeat
                sleep(1)
            until (turtle.suckDown() == true)
        end

        -- loop over the turtle's inventory slots #3 through 16
        for n = 3, 16, 1 do

            -- if the slot has bone meal(extra) place it in the inventory above
            if (turtle.compareTo(n) == true) then
                turtle.select(n)
                turtle.dropUp()
                turtle.select(2)
            end
        end
    end
end

--[[
    Start Up processing:
        Checks if the turtle has seeds in slot#1.
            If not, waits until it does

        Harvests any wheat/seeds that were planted just before the program was terminated:
            Chunk Unloaded, player log off, etc

        Empties Inventory of any extra wheat, seeds, or bonemeal that were left after the program terminated

        Refills Bone Meal if needs
]]--
turtle.select(1)
if (turtle.getItemCount(1) == 0) then
    print("Place seeds in first slot to start")
    repeat
        sleep(1)
    until (turtle.getItemCount(1) > 0)
end
turtle.dig()
emptyInventory(true)
turtle.select(2)
turtle.dropUp()
turtle.suckDown()

--[[
    Processing Loop
]]--
while true do
    -- Empty inventory and refill bonemeal if needed
    emptyInventory()
    getBoneMeal()

    -- Attempt to plant seeds from slot #1
    turtle.select(1)
    if (turtle.place() == false) then

        -- If unable, print as such
        print("Unable to place seeds, waiting...")

        -- Attempt to plant seeds once a second until successful
        repeat
            sleep(1)
        until (turtle.place() == true)
    end

    -- Attempt to use bone meal from slot#2 on seeds
    turtle.select(2)
    if (turtle.place() == false) then

        -- If unable, print as such
        print("Unable to bone meal, waiting...")

        -- Attempt to bone meal seeds once a second until successful
        repeat
            sleep(1)
        until (turtle.place() == true)
    end

    -- Continue bone mealing until unable(1.5+ bone meal nerf fix)
    while turtle.place() == true do
        getBoneMeal()
    end

    -- Check if there's a 'block'(wheat or seeds) infront of the turtle, and attempt to break it if so
    if (turtle.detect() == true and turtle.dig() == false) then

        -- Print the turtle was unable to harvest the wheat
        print("Unable to break block, waiting...")

        -- Recheck & attempt once a second until successful
        repeat
            sleep(1)
        until (turtle.detect() == false or turtle.dig() == true)
    end
end