Land Information System

Welcome to the LandIS Soil Portal

Tools and utilities

Soil Texture Triangle

Particle size class estimator

Here is a tool that allows you to estimate the particle size class of a soil sample from the proportions of sand, silt and clay. The estimator is based on the texture class intervals of the Soil Survey of England and Wales - note that other international standards also exist, such as the USDA and FAO triangles.

Enter soil sample proportions: