Here's a breakdown:

* Light soils: These soils are typically sandy with large particles. They drain quickly, making them ideal for plants that prefer well-drained conditions.

* Heavy soils: These soils are typically clay-rich with small particles. They hold water for longer periods, leading to poor drainage and potential waterlogging.

Other terms used to describe the opposite of light soil include:

* Clayey soil

* Loam soil (though loam can be medium-textured)

* Dense soil

* Compact soil

The specific term used depends on the context and the specific characteristics of the soil.