Lab Report week 2

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Ashford University - California *

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207

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Geography

Date

Apr 3, 2024

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doc

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5

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1 Properties of Soil: Agricultural and Water Availability Impacts DeMario Joyner SCI 207: Our Dependence Upon the Environment Professor Kristen Przyborski March 19, 2024
2 Properties of Soil: Agricultural and Water Availability Impacts Introduction In this week’s lab I learned about soil and the numerous effects it has on humans and the environment. This subject is important because it “earth’s soil plays a major role in the world’s agriculture and has a substantial effect on water availability in a given area (Carolina Distance Learning, n.d.).” I also learned that there are different layers or horizons of soil that contain different organic content and mineral compositions. Soil fertility is based on the pH value of found in soil, in which anything under the 7 on the pH scale is considered acidic. So rainwater with a pH level of 5.5 is considered acidic. I hypothesized that the percentages of soil sample A would be: 60% sand, 30% slit, 10% clay in activity 1. In Activity 2 I hypothesized that the soil would have the highest porosity because of how loose it is. I believe the clay will have the least porosity because it is more compact. For Activity 3 I hypothesized that Soil sample B will be less acidic because it was found further below the ground. Lastly for Activity 4 I hypothesized that sample A would contain more nutrients due to it being in O-horizon is the most nutrient-rich part of the soil profile. Results Data Tables and Observations
3 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 Depth (cm) % Clay % Silt % Sand Soil Texture Soil Sample A 0.5 2.1 2 4.5 11 45 44 100 Data Table 2. Determination of Soil Porosity Time Taken for First Drop to Emerge from Column (s) Sand Sample 42 seconds Clay Sample 1:27 Soil Sample A 2 seconds Data Table 3. pH Comparison of Soil Samples Soil Sample A Soil Sample B (Location Description: Clay ) pH 6.5 5.5 Data Table 4. Nitrogen, Phosphorus, and Potash Comparison in Soil Samples Nitrogen Phosphorus Potas h Soil Sample A N0 P1 K0 Soil Sample B N0 P0 K3
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