Soil Analysis
Soil Analysis - Related Videos
07:51
Measurements of Soil Carbon by Neutron-Gamma Analysis in Static and Scanning Modes
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Cited by 8 •
2017
Here, we present the protocol for in situ measurement of soil carbon using the neutron-gamma technique for single point measurements (static mode) or field averages (scanning mode). We also describe system construction and elaborate data treatment procedures.
07:03
Analysis of Earthworm Populations in Soil
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Using mustard, Lumbricus terrestris earthworm populations can be sampled directly from soil depths without landscape disturbance or toxicity. Earthworms can then be counted for data and statistical analysis using a bar graph and student’s t-test. Monitoring earthworm populations is a vital technique for environmental scientists, as multiple species of earthworms (most notably those from the suborder Lumbricina) have...
17:39
A Lipid Extraction and Analysis Method for Characterizing Soil Microbes in Experiments with Many Samples
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Cited by 20 •
2017
The article describes a method that increases throughput while balancing effort and accuracy for extraction of lipids from the cell membranes of microorganisms for use in characterizing both total lipids and the relative abundance of indicator lipids to determine soil microbial community structure in studies with many samples.
09:40
Lead Analysis of Soil Using Atomic Absorption Spectroscopy
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Lead occurs naturally in soil, in levels ranging from 10-50 ppm. However, with the widespread use of lead in paint and gasoline in addition to contamination by industry, urban soils often have concentrations of lead significantly greater than background levels – up to 10,000 ppm in some places. Ongoing problems arise from the fact that lead does not biodegrade, and instead remains in the soil. Serious health risks...
13:31
Soil Nutrient Analysis: Nitrogen, Phosphorus, and Potassium
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University In this experiment, three soil macronutrients are chemically extracted, combined with color-based reagents, then analyzed using color to determine the nutrient concentration present in the soil sample. Nitrogen, phosphorus, and potassium are the main components of soil fertilizer. These methods isolate each nutrient from the soil into a solution that can be analyzed using turbidity and color to determine the...
FAQs
Representative sampling ensures that measured properties reflect the soil area being evaluated rather than an unusual patch within it. Researchers collect samples before applying laboratory or field methods, then interpret results in relation to soil condition and function. This improves assessments of plant support, water regulation, carbon storage, pollution, and erosion.
These three measurement groups describe different but connected aspects of soil behavior. Physical properties help characterize conditions such as texture and moisture, chemical measurements include pH, nutrients, and contaminants, and biological properties contribute information about soil function. Considering them together supports a more complete evaluation of ecosystem health and land condition.
pH, organic matter, and nutrient concentrations provide different evidence about the soil environment and its capacity to support plants. Examining these measurements together helps researchers interpret soil condition rather than relying on one indicator alone. The resulting information can inform agriculture, conservation, sustainable resource use, and evaluations of ecosystem function.
A basic workflow begins with collecting representative soil samples from the area of interest. Researchers then apply field or laboratory methods to measure selected physical, chemical, and biological properties, including moisture, pH, organic matter, nutrients, or contaminants. Finally, they interpret the measurements to evaluate soil condition, function, and environmental risks.
The choice depends on which soil characteristics require measurement and where the evaluation is being conducted. Field methods can support direct examination of soil conditions at the site, while laboratory methods allow selected properties to be measured after samples are collected. Both approaches can contribute evidence for environmental assessment, land management, and contamination studies.
Measurements of soil properties and contaminant concentrations help identify whether pollution presents a contamination risk and clarify the condition of an affected area. Interpreting these results supports decisions about remediation, the process of addressing contaminated soil, as well as conservation and sustainable land use. The same evidence can contribute to broader ecosystem-health assessments.