What soil horizons do plants dram nutrients?

Plants primarily draw nutrients from the topsoil layer, known as the A horizon, which contains organic matter, minerals, and microorganisms that support plant growth. Below this, the E horizon, if present, can also contribute nutrients but is typically leached of minerals and organic material. The B horizon (subsoil) holds nutrients that have leached down from above but is less directly accessible to roots. Overall, the A horizon is the most critical for nutrient uptake in plants.