Answer:

q4. 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.

q5. yes, because dark brown or black color indicates that the soil has high organic matter content which helps the plants to grow healthy yields .

Soil colour can be a useful indicator of some general soil properties and processes occurring below the surface.