Final answer:
The base saturation of the soil is a measure of the proportion of soil bases to acids. Soils with high base saturation have a higher concentration of basic nutrients, essential for plant growth.
Step-by-step explanation:
The base saturation of the soil is a measure of the proportion of soil bases to acids. It represents the percentage of the soil's exchange sites that are occupied by bases. Soils with high base saturation have a higher concentration of basic nutrients, which are essential for plant growth.