When organic matter is > 1.5% in soil, rated as

Answer: Option A

When organic matter is greater than 1.5% in soil, rated as High.
Organic matter makes up just 2 - 10% of most soil's mass and has an important role in the physical, chemical and biological functions of agricultural soils. The portion made of fresh organic material and living organisms, as well as partially decomposed material that is slowly decomposing, is called active organic matter.