diff --git a/maidroid/api.lua b/maidroid/api.lua
index 426ac85..4eb550b 100644
--- a/maidroid/api.lua
+++ b/maidroid/api.lua
@@ -145,9 +145,10 @@ function maidroid.maidroid.set_wield_item_stack(self, stack)
 end
 
 -- maidroid.maidroid.add_item_to_main add item to main slot.
+-- and returns leftover.
 function maidroid.maidroid.add_item_to_main(self, stack)
 	local inv = self:get_inventory()
-	inv:add_item("main", stack)
+	return inv:add_item("main", stack)
 end
 
 -- maidroid.maidroid.move_main_to_wield moves itemstack from main to wield.
diff --git a/maidroid_core/cores/farming.lua b/maidroid_core/cores/farming.lua
index 19eb30d..4cfdc25 100644
--- a/maidroid_core/cores/farming.lua
+++ b/maidroid_core/cores/farming.lua
@@ -92,13 +92,20 @@ do -- register farming core
 		end
 	end
 
+	local function to_walk_randomly(self)
+		self.state = state.WALK_RANDOMLY
+		self.time_counters[1] = 0
+		self.time_counters[2] = 0
+		self:change_direction_randomly()
+	end
+
 	local function to_walk_to_plant(self, path, destination)
 		self.state = state.WALK_TO_PLANT
 		self.path = path
 		self.destination = destination
 		self.time_counters[1] = 0 -- find path interval
 		self.time_counters[2] = 0
-		self.pre_position = self.object:getpos()
+		self:change_direction(self.path[1])
 	end
 
 	local function to_walk_to_mow(self, path, destination)
@@ -107,7 +114,25 @@ do -- register farming core
 		self.destination = destination
 		self.time_counters[1] = 0 -- find path interval
 		self.time_counters[2] = 0
-		self.pre_position = self.object:getpos()
+		self:change_direction(self.path[1])
+	end
+
+	local function to_plant(self)
+		if self:move_main_to_wield(function(itemname)	return (minetest.get_item_group(itemname, "seed") > 0 end)) then
+			self.state = state.PLANT
+			self.time_counters[1] = 0
+			self.object:set_velocity{x = 0, y = 0, z = 0}
+			return
+		else
+			to_walk_randomly(self)
+			return
+		end
+	end
+
+	local function to_mow(self)
+		self.state = state.MOW
+		self.time_counters[1] = 0
+		self.object:set_velocity{x = 0, y = 0, z = 0}
 	end
 
 	local function walk_to_plant_and_mow_common(self, dtime)
@@ -128,8 +153,21 @@ do -- register farming core
 		end
 
 		-- follow path
-		if vector.distance(path[1], self.object:getpos()) < 0.01 then
-			table.remove(path, 1) -- next step, follow next path.
+		if vector.distance(self.path[1], self.object:getpos()) < 0.01 then
+			table.remove(self.path, 1)
+
+			if #self.path == 0 then -- end of path
+				if self.state == state.WALK_TO_PLANT then
+					to_plant(self)
+					return
+				elseif self.state == state.WALK_TO_MOW then
+					to_mow(self)
+					return
+				end
+			else -- else next step, follow next path.
+				self:change_direction(self.path[1])
+			end
+
 		else
 			-- if maidroid is stopped by obstacles, the maidroid must jump.
 			local velocity = self.object:getvelocity()
@@ -142,6 +180,65 @@ do -- register farming core
 		end
 	end
 
+	local function plant(self, dtime)
+		if self.time_counters[1] >= 5 then
+			if is_plantable_place(self.destination) then
+				local stack = self:get_wield_item_stack()
+				stack:take_item(1)
+				self:set_wield_item_stack(stack)
+				return
+			end
+			to_walk_randomly()
+			return
+		else
+			self.time_counters[1] = self.time_counters[1] + 1
+		end
+	end
+
+	local function mow(self, dtime)
+		if self.time_counters[1] >= 5 then
+			if is_mowable_place(self.destination) then
+				local destnode = minetest.get_node(self.destination)
+				minetest.remove_node(self.destination)
+				local stacks = minetest.get_node_drops(destnode.name)
+
+				for _, stack in ipairs(stacks) do
+					local leftover = self:add_item_to_main(stack)
+					minetest.add_item(self.destination, leftover)
+				end
+			end
+			to_walk_randomly()
+			return
+		else
+			self.time_counters[1] = self.time_counters[1] + 1
+		end
+	end
+
+	local function plant_and_mow_common(self, dtime)
+		if self.time_counters[1] >= 5 then
+			if (self.state == state.PLANT and not is_plantable_place(self.destination)
+			or (self.state == state.MOW   and not is_mowable_place(self.destination)) then
+
+
+				local inv = self:get_inventory()
+				local stacks = inv:get_list("main")
+
+				for idx, stack in ipairs(stacks) do
+					local item_name = stack:get_name()
+					if minetest.get_item_group(item_name, "seed") > 0 then
+						minetest.add_node(self.destination, {name = item_name, param2 = 1})
+						stack:take_item(1)
+						inv:set_stack("main", idx, stack)
+						break
+					end
+				end
+			end
+			to_walk(self)
+		else
+			self.time_count = self.time_count + 1
+		end
+	end
+
 	local function on_step(self, dtime)
 		if self.state == state.WALK_RANDOMLY then
 			walk_randomly(self, dtime)