Soil Testing

Shanti
5 days ago
2 min read

Explore the work of people investigating, documenting and teaching about plants, ecosystems and environmental change.

Shanti Plants - The Earth Provides

Natural-light soil testing scene beside a garden bed with several soil cores, clear soil sample bags, a closed field notebook, pH and conductivity meters, a probe and metal infiltration ring arranged neatly for environmental monitoring. — A practical soil-testing setup beside a productive garden bed, showing soil cores collected from different depths alongside sample bags, monitoring meters, an infiltration ring and field notebook for assessing soil condition and performance.

Soil testing replaces guesswork with observations and measurements. A useful test begins with a clear question, representative samples and a method suited to the decision. Field checks can reveal patterns, while accredited laboratory analysis is often needed for reliable nutrient, salinity, contaminant or amendment decisions.

What This Index Covers

This index covers planning a sampling pattern, recording site conditions, field texture and infiltration checks, pH and electrical conductivity, laboratory nutrient testing, organic carbon, biological indicators and reading reports. It also explains why sampling depth, timing, units and method matter.

Browse Resources

Browse the resource areas currently organised under this index. Links can be added as reviewed articles and records are published.

Planning and sampling - Choosing locations, depths, timing and clean equipment.

Field observations - Recording colour, smell, structure, roots, moisture and restrictions.

Physical tests - Assessing texture, infiltration, compaction and aggregate stability.

Chemical tests - Understanding pH, salinity, nutrients and exchange measurements.

Biological indicators - Using roots, earthworms, respiration or other indicators cautiously.

Interpreting results - Matching methods, units and reference ranges to the crop and soil.

Read First

Before using these resources for identification, growing, harvesting, conservation, community work or other practical decisions, read:

Representative Sampling Before Any Test

Units, Methods & Laboratory Accreditation

Contaminated Soil and When to Seek Expert Advice

Coverage and Evidence

Results are only as reliable as the sample and method. Home kits can be useful for screening but should not be treated as equivalent to accredited laboratory analysis. Nutrient targets differ by plant, soil and production goal; adding fertiliser without need can damage roots and waterways. Suspected contamination, acid sulfate soil, severe salinity or unexplained plant losses require appropriate professional advice.

The Earth's Resource Map and Learn library are being built progressively. Indexed means that a topic or resource can be connected to its identity, source and broad context; it does not mean that every claim has been verified or localised. Evidence is assessed claim by claim. Where information is missing, uncertain, restricted or location-dependent, that limitation should remain visible.

Last Reviewed

19 August 2026

This date records review of this index-page copy and its resource structure. Individual articles, records, laws, project details and evidence may have different publication and review dates.