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Also asked, what is blue clay soil?

Blue clay is an expansive soil, which means when blue clay gets wet, it expands. It has a high absorptive property, and it expands in volume once it absorbs water in high quantities. Blue clay is most often found in Southern Utah, and it's affected several areas in Washington County for the worse.

One may also ask, what gives soil its color? Soil color is produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil.

Also know, is there blue dirt?

Solid blue, just as earth soil is solid brown. In other words not brown with little blue rocks or something. The soil is permanently blue, not temporary. The soil is not stained or tinted blue, but it's the composition or chemicals/elements in the soil that make it blue.

Can soil color indicate the fertility status of the soil?

Soils of higher organic matter content are generally less reflective or darker in color than those soils with lower organic matter content; therefore, soil color has long been associated with native soil fertility.