Sand Ruler

The grain size distribution (or texture) of a soil is one of its most important qualities. It strongly influences agricultural soil properties such as ease of tillage, capillary conductivity, moisture availability, permeability, compaction, and rooting potential.

The sand ruler is a transparent disc with standard specimen samples (standard graduations), serving as an excellent visual aid in estimating granular composition and determining particle size distribution. By using the ruler, you can classify the sand fraction according to its median size, giving you a useful indication of soil texture.