WHAT DOES NPK 20-20-20 LIQUID FORM MEAN?

Is this a good idea or its Wrong advice? is this akin to making use of fertiliser (eg topping fertiliser) on the surface of the soil?The photo voltaic radiation is specifically proportional to the heat reaching the soil. Humidity is the amount of moisture that is presented while in the soil. The DHT11 sensor is utilized to evaluate temperature. Soi