Physical Evidence of Soil and Glass

How we study soil visually

macroscopic and microscopic

macroscopic

visible to the naked eye

microscopic

too small to be seen except under a microscope

Analytical testing of soil

pH, Density, Refractive index,Mineral composition, size, texture, and color

soil shapes

Angular, semi rounded, rounded

soil size

clay is the smallest, biggest is boulders

PARTICLE SIZES OF TYPICAL SOILS

Coarse particles (diameter 0.10 - 2.0 mm) form sand
Finer particles (< 0.10 < 0.002 mm) form silt
Finest particles (< 0.002mm) form clay

TEXTURE CLASSIFICATIONS

Sand, Silt, Clay, Loam

ASSESSING SOIL COLOR

Munsell Color System

CHEMICAL PROPERTY OF SOIL

pH

CLASSIFICATION OF SOIL pH

CHARACTERISTICS OF GLASS

solid, brittle, amorphous substance, not crystaline

Is glass individual or class evidence?

class most of the time