Fix desert_sand_soil dropping itself, and changed the descriptions

mods/farming/nodes.lua

@@ -53,7 +53,8 @@ minetest.override_item("default:desert_sand", {
 	}
 })
 minetest.register_node("farming:desert_sand_soil", {
-	description = "Desert Sand",
+	description = "Desert Sand Soil",
+	drop = "default:desert_sand",
 	tiles = {"farming_desert_sand_soil.png", "default_desert_sand.png"},
 	is_ground_content = true,
 	groups = {crumbly=3, not_in_creative_inventory = 1, falling_node=1, sand=1, soil = 2, desert = 1},
@@ -66,7 +67,7 @@ minetest.register_node("farming:desert_sand_soil", {
 })
 
 minetest.register_node("farming:desert_sand_soil_wet", {
-	description = "Desert Sand",
+	description = "Wet Desert Sand Soil",
 	drop = "default:desert_sand",
 	tiles = {"farming_desert_sand_soil_wet.png", "farming_desert_sand_soil_wet_side.png"},
 	is_ground_content = true,