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Laboratory 5 Determination of Soil Colour

This document provides instructions for determining soil color using a Munsell soil color chart. The chart displays 199 standardized color chips arranged by hue, value, and chroma. Students will observe and record the dry and wet colors of various soil samples using the chart's notation system. The objectives are to identify different soil colors and learn to use the Munsell chart. Results will be recorded showing each soil sample's dry and wet color notation and name.

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Muhd Akim
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2K views2 pages

Laboratory 5 Determination of Soil Colour

This document provides instructions for determining soil color using a Munsell soil color chart. The chart displays 199 standardized color chips arranged by hue, value, and chroma. Students will observe and record the dry and wet colors of various soil samples using the chart's notation system. The objectives are to identify different soil colors and learn to use the Munsell chart. Results will be recorded showing each soil sample's dry and wet color notation and name.

Uploaded by

Muhd Akim
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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LABORATORY 5

Determination of Soil Colour

INTRODUCTION

Soil colours are most conveniently measured by comparison with a colour chart. The collection of
charts generally used with soils is a modified version of the collection appearing in the Munsell Book
of Soil Colour.

The charts in the Soil Collection display 199 different standard colour chips systematically
arranged according to their Munsell notations, on cards carried in a loose leaf notebook. The
arrangement is by the three simple variables that combine to describe all colours and are known in the
Munsell system as Hue, Value, and Chroma.

In writing the Munsell notation, the order is hue, value, chroma with a space between the hue
letter and the succeeding value number, and virgule between the two numbers for value and chroma.
If expression beyond the whole numbers is desired, decimals are always used fractions. Thus, the
notation for a colour of hue 5YR, value 5, chroma 6 is 5YR 5/6, a yellowish-red.

In using the colour chart, accurate comparison is obtained by holding the soil sample directly
behind the apertures separating the closet matching colour chips.

OBJECTIVES

1. To identify different colous of soils.


2. To faimiliarize the students in using the Munsell Colour Chart.

APPARATUS AND MATERIALS

Samples of different colours of soils, Munsell Colour Chart.

PROCEDURES

1. Determine the colours of the air-dry soil samples provided by using the Munsell Colour
Chart.
2. Wet the samples and then determine the colours.
3. Use the colour names in the chart to record results.
RESULTS

Dry Sample Wet Sample

Soil Sample Colour notation Colour name Colour notation Colour name

Top soil 1

Sub soil 1

Top soil 2

Sub soil 2

QUESTIONS

1. From your results, what is the most common colour of soil in Malaysia?

= From the results, the most common colour of soil in Malaysia is Yellow and Red

2. How does moisture affect the colour of soil?

= Soil colour does not affect the behavior and used of soil. It can indicate the composition of
the soil

3. What is the main mineral that affects the soil colour?


=

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