Added barley, tidied and tweaked code

grass.lua

@@ -1,7 +1,7 @@
 
--- Override default grass and have it drop Wheat Seeds
+for i = 3, 5 do
 
-for i = 1, 5 do
+	-- Override default grass and have it drop Wheat Seeds
 
 	minetest.override_item("default:grass_" .. i, {
 		drop = {
@@ -13,6 +13,20 @@ for i = 1, 5 do
 		},
 	})
 
+	-- Override default dry grass and have it drop Barley Seeds
+	if minetest.registered_nodes["default:dry_grass_1"] then
+
+		minetest.override_item("default:dry_grass_" .. i, {
+			drop = {
+				max_items = 1,
+				items = {
+					{items = {'farming:seed_barley'}, rarity = 6},
+					{items = {'default:dry_grass_1'}},
+				}
+			},
+		})
+	end
+
 end
 
 -- Override default Jungle Grass and have it drop Cotton Seeds
@@ -25,4 +39,4 @@ minetest.override_item("default:junglegrass", {
 			{items = {'default:junglegrass'}},
 		}
 	},
-})
+})