Week Two Lab Worksheet Soil Properties
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School
Ashford University *
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Course
207
Subject
Geology
Date
Jan 9, 2024
Type
docx
Pages
3
Uploaded by syluntdove
Lab Worksheet
Hypotheses:
Activity 1.
Particle
Size Distribution
and Determination
of Soil Texture
hypotheses:
the
percentages of sand
silt and clay
Sand 50%
Silt 45%
Clay 5%
Activity 2.
The
Porosity of
Different Soil Types
Hypothesis:
Which
sample has the
highest and lowest
porosity and explain
Clay least porosity
Grains are small and
Have a lot of pores
inbetween
Sand the highest
porosity
Grains are bigger
allowing for more
space inbetween the
pores
Activity 3
.
pH Test Comparison of Soil Samples
Hypothesis: which sample will be more acidic and why
Sample A more acidic- it is directly from the ground near a rocky area
Sample B More basic – soil is potting soil specifically designed to grow food so I don’t think
it would have acid in it otherwise, it would kill the plants
Activity 4.
Nitrogen, Phosphorous, and Potash Test Comparison of Soil Samples
Hypothesis: Which will have a higher level of nutrients, and which will have lower and why
Sample A lower level of nutrients- pulled from the ground that only grows grass.
Sample B Higher level of nutrients- potting soil made for grown plants
1
Observations/Data Tables
Data Table 1. Particle Size Distribution and Soil Type
Depth of
Clay
Layer
(cm)
Depth
of Silt
Layer
(cm)
Depth of
Sand
Layer
(cm)
Total
Dept
h
(cm)
%
Clay
%
Silt
%
San
d
Soil
Textur
e
Soil
Sample A
1.5 cm
.5cm
3cm
5cm
30%
10%
60%
Sandy
clay
loam
Data Table 2. Determination of Soil Porosity
Time Taken for First Drop to Emerge from
Column (s)
Sand Sample
12.71 seconds
Clay Sample
900 seconds
Soil Sample A
1 second
continued on next page
2
Carolina Distance Learning
Data Table 3. pH Comparison of Soil Samples
Soil Sample A
Soil Sample B
(Location Description: potting soil
)
pH
7 neutral
6 acidic
Data Table 4. Nitrogen, Phosphorus, and Potash Comparison in Soil Samples
Nitrogen
Phosphorus
Potas
h
Soil Sample A
Very low
Low/medium
Very low
Soil Sample B
Low/medium
medium
Very low
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