Which soil class has low productivity and is often too wet or stony?

The classification of soil into different groups is based on its productivity and the characteristics that affect its usability for agricultural purposes. Group D soils are specifically identified as having low productivity due to their poor drainage or physical composition, often being too wet or stony. These conditions make it challenging to cultivate crops effectively, as excess moisture can lead to waterlogging and stoniness can hinder root growth.

The characteristics of Group D soils often include high clay content, which retains moisture, or rocky configurations that provide insufficient tilth for farming. These factors limit the types of crops that can be grown and reduce overall agricultural output. As such, Group D is recognized for its limitations in productivity, reflecting the attributes that define it as suitable for only specific uses or, in many cases, making it unsuitable for typical agricultural practices.