Which part of soil has organic materials incorporated with the mineral matter, nutrients and water?

Explanation

The correct answer is Horizon A. Key Points Horizon A part of soil has organic materials incorporated with the mineral matter, nutrients and water. Soil horizons are layers parallel to the soil surface whose physical, chemical and biological characteristics differ from the layers above and beneath. Important Points There are commonly 5 layers or horizons found in the soil. They are known as O, A, B, C & R horizons. O Horizon Soi:l It contains a huge amount of organic matter. A Horizon Soil: It is a leached mineral horizon (dark in color) with a high content of organic matter. This horizon is also called ‘Topsoil’. B Horizon Soil: This horizon is a zone of accumulation of fine materials and mineral Precipitates like clay, iron, carbonates, gypsum, etc. This horizon is also called ‘Subsoil’. C Horizon Soil: This horizon contains rock fragments of different sizes (partly weathered rocks). R Horizon Soil: This layer is composed of hard bedrock (unaltered rock layer).