View difference between Paste ID: 4SHjtFAU and vVHWv7S9

 -- pastebin get 4SHjtFAU tfarm.lua
 -- This turtle program harvests rows of crops with rows of water between them
-local turnRightFirst = true
+-- Seeds go in the first slot and fuel goes in the last (16th) slot. Everything else gets dumped.
 -- The turtle needs to be outside the end of the last crop row facing into the row and 1 block above crop height
 -- To automate storage of crops and extra seeds place a chest under this position
 
 -- Farm parameters
 local rowLength = 20
 local numRows = 16
 local matureCropStage = 7 -- 7 will work for most crops
 local turnRightFirst = true -- true if the first turn needed to face the next row is right
 --Network parameters
 local networkMessageKeyword = "harvest" -- if received over the network, this will trigger a harvest
 local modemSide = "left" -- side the modem is on
 
 
-    print("Harvesting...")
+-- Initialize
-    setActiveSlot(1)
+
-    turtle.digDown()
+
-    turtle.placeDown()
+local onFirstRow = true;
 
 function setActiveSlot(slotNumber)
     slotNumber = tonumber(slotNumber)
     if slotNumber ~= nil then
         currentSlot = slotNumber
         turtle.select(slotNumber)
     end
-function turn(numberOfTimes, goRight)
+
 
-        for i=0, numberOfTimes do
+
-            turtle.turnRight()
+    local success, data = turtle.inspectDown()
 
     if success then
-        for i=0, numberOfTimes do
+        if data.state.age == matureCropStage then -- 7 = fully grown
-            turtle.turnLeft()
+            setActiveSlot(1)
             turtle.digDown()
             turtle.placeDown()
         end
     end
 end
-    turtle.forward()
+
-    turtle.turnRight()
+
-    for i=0, 30 do
+
-        turtle.forward()
+
 end
 
 function forceMoveForward()
-refuelFromLastSlot()
+    while not turtle.forward() do
-for i=0, numRows do
+        print("Failed to move forward!")
-    for j=0, rowLength do
+        sleep(1)
-        turtle.forward()
+
 end
 
 function forceTurn(goRight)
-    turn(1, turnRightNext)
+
-    turtle.forward()
+        while not turtle.turnRight() do
-    turtle.forward()
+            print("Failed to turn right!")
-    turn(1, turnRightNext)
+            sleep(1)
-    turnRightNext = not turnRightNext
+
     else
         while not turtle.turnLeft() do
-returnHome()
+            print("Failed to turn left!")
             sleep(1)
         end
     end
 end
 
 function forceDropDown()
     while not turtle.dropDown() do
         print("Failed to transfer items!")
         sleep(1)
     end
 end
 
 function returnHome()
 
     local distanceToHome = (numRows * 2) - 2
 
     forceMoveForward()
     forceTurn(true) -- TODO handle more cases
 
     for i=1, distanceToHome do
         forceMoveForward()
     end
 
     forceTurn(true)
 end
 
 function transferItems()
     for i=2, 15 do
         turtle.select(i)
         turtle.dropDown()
     end
 end
 
 function harvestField()
     print("Harvesting crops...")
     refuelFromLastSlot()
     forceMoveForward()
 
     for i=1, numRows do
 
         if onFirstRow == true then
             onFirstRow = false
         else
             -- Get to next row
             forceTurn(turnRightNext)
             forceMoveForward()
             forceMoveForward()
             forceTurn(turnRightNext)
 
             -- Zig zag efficiently through the crop rows
             turnRightNext = not turnRightNext
         end
 
         for j=2, rowLength do
             harvest()
             forceMoveForward()
         end
 
         harvest()
 
     end
 
     returnHome()
     transferItems()
 
     turnRightNext = turnRightFirst
     onFirstRow = true
 
 end
 
 -- Execution starts here --
 print("Listening for messages...")
 rednet.open(modemSide)
 while true do
     id, msg = rednet.receive()
     if msg == networkMessageKeyword then
         rednet.close(modemSide)
         harvestField()
         print("Harvest finished. Listening...")
         rednet.open(modemSide)
     end
 end