Fertiliser needed to make 300 L of 1% solution is

The fertilizer needed to make 300 L of 1% solution is 3 kg.
As 1% of 300 is 3 therefore, the amount of fertilizer required will be 3 kg.
The amount of fertilizer is decided after the proper testing of soil, what nutrient is required in which amount according to the type of crop grown on that certain piece of land.