What is primarily needed to provide proper classification of soil properties?

The classification of soil properties relies on a comprehensive understanding of both qualitative and quantitative information. Qualitative data may include visual descriptions of soil texture, color, and structure, while quantitative data typically involves measurements such as grain size distribution, moisture content, and soil density. Together, these types of information allow for accurate identification and understanding of soil behavior, which is crucial for various engineering and construction applications.

In contrast, relying solely on a single numerical assessment would provide limited insights and fail to capture the complexity of the soil's characteristics. A visual inspection alone would omit essential data needed for classification. Random sampling may yield valuable information, but without the context provided by qualitative and quantitative analysis, it may not ensure a valid classification of the soil as a whole. Therefore, a comprehensive approach incorporating both types of information is essential for proper classification of soil properties.