question what is the relationship between soil color and the ability to support the growth of plants? responses dark soil contains more rocks, which provide minerals needed for plant growth. dark soil contains more rocks, which provide minerals needed for plant growth. light soil contains more sand, which provides water drainage for plant growth. light soil contains more sand, which provides water drainage for plant growth. dark soil has more humus, which contains nutrients needed for plant growth. dark soil has more humus, which contains nutrients needed for plant growth. light soil has more humus, which contains nutrients needed for plant growth.