Final answer:
The A horizon in the soil profile is primarily loam, which is a balanced combination of sand, silt, and clay particles. It contains both organic and inorganic materials, making it fertile and suitable for plant growth.
Step-by-step explanation:
The A horizon in the soil profile is primarily loam. It consists of the top layer of soil and contains a mixture of organic matter (such as decomposed plant and animal material) and inorganic materials (such as minerals and rocks). Loam is a soil type that contains a balanced combination of sand, silt, and clay particles. It has good drainage and nutrient-holding properties, making it fertile and suitable for plant growth.
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