A soil test rating of 'High' means fertiliser dose is

A soil test determines fertility and the expected growth potential of the soil which indicates nutrient deficiencies, potential toxicities from excessive fertility and inhibitions from the presence of non-essential trace minerals. The test is used to mimic the function of roots to assimilate minerals.
A soil test rating of ‘High’ means fertilizer dose is less which means the soil is good enough and fertilizer and nutrient requirements from the outer source are less.