Growth and environment are intertwined in people and plants.  Soil is a critical part of the environment plants need to grow and be healthy.

There is no such a thing as excellent soil or better soil. There is only appropriate and productive soil which entirely depends on your plant.  

Texture is one of the basic elements of evaluating soil.

Soil texture refers to the combination of clay, sand and silt which are classified by size.

From smallest which is clay with particle sizes less than 0.002mm, we move to silt at 0.002-0.02 mm and then fine sand at 0.02-0.2mm and finally coarse sand at 0.2-2 mm

Fine particles when moist stick together, hold water and form a water barrier. Coarse particles allow the water to flow through.

Each plant has its own requirement. Most do not like to have wet roots. The appropriate texture for each plant provides enough water for the root system to absorb soil nutrients soaking it.

Too much clay keeps the roots wet. Too much sand allows the water too escape quickly, sometimes without allowing the roots to absorb the water or the nutrients.