The ribbon test is a method for estimating soil texture. A moistened clump of soil is squeezed between the thumb and fingers. The length of ribbon that holds together is a predictor of the relative amounts of sand and clay in the soil. With 20% or more clay content, one would expect a ribbon to be two inches or longer. Sandy soil will generally produce a one inch or shorter ribbon.
What can be concluded about a soil sample that produces a 0.5 inch ribbon using the ribbon test?