While there are a great many organic soil amendments, for improving clay soil, you will want to stick to compost or materials that compost quickly. Materials that compost quickly includes well-rotted manure, leaf mold, and green plants. Because clay soil can become compacted easily, place about 3 to 4 inches
Top soil.
Because soil has nutrients that clay and sand don't have
I have red clay soil and I don't think anything grows well in it unless you dig most of the clay out and put top soil in it.
Wheat grows best in clay and loamy soil because these soil types retain moisture well, provide good drainage, and have a high nutrient content. The compact nature of clay soil helps support the wheat plants, while the nutrient-rich loamy soil promotes healthy growth.
Top soil usually has humus and minerals which are often absent from sand, clay or gravel.
The best garden soil is often referred to as loamy soil, which is a balanced mixture of sand, silt, and clay. It provides good drainage, retains moisture well, and has a good balance of nutrients for plant growth. It is often recommended for a wide variety of plants.
Clay soil can be amended without tilling by adding organic matter such as compost, mulch, or manure on top of the soil. This helps improve soil structure, drainage, and fertility over time without disturbing the soil layers.
Subsoil is the layer of soil beneath topsoil, containing less organic matter and typically higher concentrations of clay and minerals. Topsoil is the uppermost layer of soil, rich in organic matter and nutrients necessary for plant growth.
The plants in the clay and top soils didn't sprout because clay is hard and top soil doesn't have many nutrients for the plant to grow in. our prediction was that the organic soil would grow the tallest and another said that the coffee soil would grow best. This person had a valid reason. Coffee is very rich, therefore it could grow better.The people with organic soil as their prime suspect also had a valid reason: organic soil has no chemicals to stop the plant from growing.
Top soil is most likely to be thickest in areas with ample vegetation and organic matter accumulation, such as forests or grasslands. These environments support the growth and decomposition of plants, resulting in rich, deep layers of top soil.
The top layer of soil is the most fertile layer. It is the best for growing crops.
Generally, most plans grow roots in the top 12 inches of the soil, e.g. the topsoil layer is the most important