Assignment #14 - Soil
Characteristic Investigation – Day 3 Questions
Answer all of the
following questions to the best of your ability in complete sentences in your
LAB NOTEBOOK.
Activity 5 – Particle Size Distribution
1. What do you think is
composition of soils that naturally occur in New York City (as naturally as
anything occurs in NYC)? For example, is it sandy loam or silty clay or clay?
Use your notes and data from previous parts of the investigation for
assistance.
2a. A soil sample is
collected, analyzed, and determined to contain 30% sand and 20% clay. According
to the soil composition chart in your notes, how should this soil be
classified? How much silt is present in the sample?
2b. Another soil sample is
collected and analyzed, but all that can be detected is that it is comprised of
60 percent clay. How should it be classified?
3. What is loam and why is
it desirable?
4. Make inferences based
on your observations and data. Evaluate
your hypothesis as well. Support these inferences by referring to your
data. Be specific.
Reading
Read “Human Activities Triggering “Global Soil Change” and “High Prices Sow Seeds of Erosion” via the
class website and answer the question below.
5. How have human
activities impact soils and their quality worldwide?
Activity 4 – Determination of
Soil Permeability
|
|
Dry Sample
|
Wet Sample
|
||
|
|
Time
for first drop
|
Time
for entire sample
|
Time
for first drop
|
Time
for entire sample
|
|
Sand
|
1:09
0:55
1:07
|
2:29
4:02
7:55
|
0:02.1
0:04
0:10
|
8:03.57
6:15
|
|
Clay
|
5:19
5:38
|
unknown
|
3:00
|
|
|
Humus
|
0:17
0:03
0:12
|
:37
|
0:30
0:18
|
8:34
|
|
Local
Soil
|
0:25
0:14
0:20
|
1:17
1:54
1:10
|
0:05
|
10:00
|
Activity 5 - Particle Size Distribution and Soil Type
Depth of Clay Layer - 5 mm
Depth of Silt Layer - 6 mm
Depth of Sand Layer - 18 mm
Total Depth - 29 mm
% Clay = ?
% Silt = ?
% Sand = ?
Soil Type = ?
No comments:
Post a Comment