soil texture triangle worksheet

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INTRODUCTION TO SOILS SOIL TEXTURAL TRIANGLE FACILITATORS: M PAUL | KK MCKENZIE 0 THE SOIL TEXTURAL TRIANGLE (RULER MUST BE PARALLEL TO THE CLAY LINE) (RULER MUST BE PARALLEL TO THE SILT LINE) (RULER MUST BE PARALLEL TO THE SAND LINE)

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Page 1: Soil Texture Triangle Worksheet

INTRODUCTION TO SOILS SOIL TEXTURAL TRIANGLE FACILITATORS: M PAUL | KK MCKENZIE

0

THE SOIL TEXTURAL TRIANGLE

(RULER MUST BE

PARALLEL TO THE CLAY

LINE)

(RULER MUST BE PARALLEL TO THE SILT

LINE)

(RULER MUST BE

PARALLEL TO THE SAND

LINE)

Page 2: Soil Texture Triangle Worksheet

INTRODUCTION TO SOILS SOIL TEXTURAL TRIANGLE FACILITATORS: M PAUL | KK MCKENZIE

1

Practice Exercises

% Sand % Silt % Clay Texture Name

a) 75 10 15 _______________________ b) 10 83 7 _______________________

1. Using your soil texture chart and example, determine the following soil textural class using the percentages given.

% Sand % Silt % Clay Soil Texture example 75 10 15 sandy loam

a) 90 5 5 __________________________ b) 40 45 15 __________________________

c) 15 10 75 __________________________

d) 10 46 44 __________________________

e) 55 10 45 __________________________

2. A sample of soils was screened and the size separates (smaller than 2mm) were determined,

along with the following results:

Sand content (2 – 0.04mm diameter) 140 grams

Silt content (0.05 – 0.002mm diameter) 38 grams

Clay content (<0.002mm diameter) 22 grams

Determine the percentage of the total weight of each soil portion, and using the Soil Texture Triangle,

determine the soil textural class.