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An Overview of Soil Testing

Are you doing business in any of the sectors such as construction, renewable energy, environmental sustainability, and agriculture? If so, you are at the right place. Let Corpbiz experts conduct soil testing for you.

Soil Testing is a chemical analysis recognized as a scientific means for quick characterization of soil fertility & nutrient status. It ensures conducting an agricultural analysis for a variety of factors such as chemical content, toxicity, pH level, salinity, and earth-dwelling biota.

Regular soil testing is not only important for the producers but also benefits all the valuable agribusiness participants, such as agri-coops, crop insurers, banks, input suppliers, and commodities dealers. However, the objective of soil testing is to sort out the nutrient-deficient areas from non-deficient ones and ensure these elements interact with each other in a complex balance affecting the growth of the plants.

Speak to our environmental consultants today and conduct seamless soil testing for your project.

Overview of Soil Testing
Historical Background of Soil Testing Service in India

Historical Background of Soil Testing Service in India

The soil testing service started during the year 1955-56 and led to the set up of 16 soil testing laboratories to serve the Intensive Agricultural District Programme (IADP) in selective districts. Presently, there exists 661 soil testing laboratories including 120 mobile vans, which ensures analysing annual soil samples of 7.2 million capacity. Moreover, around 500 stationary and 250 mobile soil testing labs are proposed to be set up under the XI Plan of the National Project on Management of Soil Health and Fertility.

Benefits of Conducting Soil Testing

The benefits of conducting soil testing, which ensures addressing the shortcomings and making necessary modifications, are as explained below:

Benefits of Conducting Soil Testing
Determination of Soil Types

1. Determination of Soil Types

Soil testing determines the type of soil supplying adequate nutrients for optimum crop production.

Improved Social Health

2. Improved Social Health

The conduct of soil testing ensures valuable insights into improved soil health, including organic matter, content, pH, and texture.

Improved Crop Yields

3. Improved Crop Yields

Soil testing ensures identifying nutrient deficiencies or imbalances in the soil, enabling growers to adjust their fertilization practices and improve their crop yields.

Environmental Protection

4. Environmental Protection

Soil testing enables applicants to reduce the risk of nutrient run-off and associated environmental problems.

Measurement of Water Table

5. Measurement of Water Table

Soil testing ensures measuring and providing information with respect to the nature of the soil, salinity, soil management history, frequency of water logging and water table.

Preparation of Soil Fertility Maps

6. Preparation of Soil Fertility Maps

The capacity of soil testing labs to analyse the soil samples enables generating data for the preparation of soil fertility maps showing the availability of nitrogen, phosphorus, and potassium in Indian soil.

Preparation of Soil Fertility Maps

7. Determining Soil Characteristics

The study & testing of soil in India ensures determining the soil characteristics, including external land features and environmental factors that are given prominence.

Eligibility Criteria for Soil Testing in India

The eligibility criteria required for soil testing in India, which may reveal the fertility and health of your soil, include:

Checklist for Applicants Seeking Soil Testing

  • Conduct pre-plant media studies to identify possible nutritional deficits, pH imbalances, or excess soluble salts. This is especially critical for gardeners who prepare their own media.
  • Conduct media tests throughout the growing season to control crop nutrition and soluble salt levels.
  • Prevent inaccurate interpretation of results, interpretive data should always be utilized for the particular soil testing technique.
  • Collect a soil sample for testing around 2 hours after fertilization or on the same day. Gently remove slow-release fertilizer pellets present from the sample.
  • Take soil samples from diversified species of crops cultivated in a greenhouse.
  • Ensure collecting & comparing samples from both normal and aberrant plants upon identification of any problem.
  • Ensure consistent compliance with all sampling protocols.
  • Do not compare soil test results received from different laboratories. Testing procedures might differ.

Checklist: Who Needs to Conduct Soil Testing?

  • Farmers and Agriculturists
  • Construction and Infrastructure Developers
  • Environmentalists and Researchers
  • Industrialists and Mining Companies
  • Horticulture and Plantation Managers
Checklist: Who Needs to Conduct Soil Testing
Materials Required for Soil Testing

Materials Required for Soil Testing

The materials required for carrying out the different methods for soil testing in India are as discussed below:

  • 7 to 10 cm diameter ring
  • Wooden block
  • Flat-bladed knife
  • Soil probe or soil auger
  • Hand trowel or shovel
  • Tensiometer
  • pH meter
  • Calibration solutions
  • Conductivity meter
  • Filter paper
  • Impermeable plastic material
  • Sealable paper bags
  • Paraffin wax
  • Oven dryer
  • Weighing scale
  • A microwave or an oven

Step-by-Step Guide for Soil Testing

The process for soil testing, which ensures determining the chemical, physical and biological properties of soil, is as discussed below:

Step-by-Step Guide for Soil Testing

Step. Find/ Select Soil Testing Laboratory

The entities seeking soil testing must initially find/ select their local or extension office providing information with respect to soil testing laboratories available in the area.

Step. Take Soil Samples for Testing

The entities are further required to take soil samples for testing based on diversified sampling techniques like grid or zone soil sampling.

Step. Submit Samples for Professional Analysis

Submit samples for professional analysis to a state or private laboratory. These local laboratories provide soil test techniques for free.

Step. Conduct Sample Analysis

The laboratories make use of analytical methods to estimate the physical properties and available nutrient levels, among other things.

Step. Review Soil Test Report

The details of the soil test report, including information related to soil fertility nutrient level, pH, and recommendations for improvement must be reviewed after the due conduct of soil sample analysis.

Step. Implementation of Soil Testing

After the review of the soil test report, soil conservation/ stabilization techniques must be implemented to adjust fertilizer application or bio-remediation in different industries.

Why Conduct Soil Testing in Different Industries?

Soil testing in different industries is conducted due to the following reasons as explained below:

Soil Testing for Farmers

  • To know the condition of your soil before planting or seeding
  • Improve crop performance by knowing the nutrient levels
  • Maximize profitability yields
  • Determine whether the crop needs nutrients and fertilizers
  • Understand nutrients required for the optimum growth of crops
  • Determine soil toxicity levels, harmful to plants
  • Identify sources of contamination in your soil

Soil Testing in Construction Industry

  • Assists in laying the foundation of the building
  • Determines depth and length of pillars laying the foundation of the building
  • Determine the likelihood of foundation problems and the best construction methods
  • Determine the water table level of the soil
  • Indicates potential issues related to the level of humidity inside the building’s foundation
  • Mineral & chemical composition of soil influences the choice of construction material
  • Indicates contents of sulphur, sulphur-resistant cement in the soil, which protects the building’s foundation
  • Determines reactivity of soil, which cannot be overstated
  • Crucial when multi-storey apartments or buildings are being constructed
  • Ensures avoiding fatal accidents or building collapses

Parameters for Soil Testing Services

The parameters/ considerations for soil testing services, crucially determining the final number on a soil report, are as outlined below:

Soil Testing Labs

Soil Testing Labs

The entities conducting soil testing must consider accredited and authorized labs before collecting samples for soil testing.

License and Permits

License and Permits

The sites conducting soil testing are required to obtain necessary licenses and permits from local zoning authorities.

Best Time to Get Soil Tests

Best Time to Get Soil Tests

Another crucial parameter for soil testing is to consider the best time for conducting the soil test during the year.

How to Take Soil Samples for Testing?

The soil analysis offers critical information for proper field treatment, but the accuracy of the findings is dependent on reliable sampling. The fundamental soil sampling techniques are based on grids and zones.

Soil Samples for Testing
  • Grip sampling approach is based on evenly spaced grids of one to five acres.
  • Cone soil sampling approach ensures collecting average samples from each field zone, separated depending upon crop maps or soil type. The greater the zone, the more soil test probes are needed (at least five subsamples for each zone, two per acre).
  • Cell sampling approach is used when a field is divided into a grid of uniformly-sized cells for independent sampling.

Soil Testing Methods

The soil testing methods or types, which ensure determining the positive and negative components/ features of the field ground, are as discussed below:

Soil Nutrient Testing

Soil Nutrient Testing

Soil nutrient testing is used to determine soil nutrient content data, which enables correct fertilization. This method further grants access to the level of nitrogen (N), phosphorus (P), and potassium (K), which are the most critical nutrients required for crops.

Soil Nutrient Testing

Soil nutrient testing is used to determine soil nutrient content data, which enables correct fertilization. This method further grants access to the level of nitrogen (N), phosphorus (P), and potassium (K), which are the most critical nutrients required for crops.

Soil Acidity Testing (pH)

Soil Acidity Testing (pH)

Soil acidity testing (pH) ensures calculating and determining the hydrogen ions/ pH levels varying from zero to fourteen. This soil testing method provides for maintaining the proper pH in the field of plant production.

Soil Acidity Testing (pH)

Soil acidity testing (pH) ensures calculating and determining the hydrogen ions/ pH levels varying from zero to fourteen. This soil testing method provides for maintaining the proper pH in the field of plant production.

Soil Salinity Test

Soil Salinity Test

Soil salinity test ensures determining the field salinity through evaporating total soluble salts (TSS) from groundwater extracts and measuring electric conductivity (EC) in saturated paste extracts or distilled water-earth dilutions. It further assists in the correct place suitable for agricultural activity.

Soil Salinity Test

Soil salinity test ensures determining the field salinity through evaporating total soluble salts (TSS) from groundwater extracts and measuring electric conductivity (EC) in saturated paste extracts or distilled water-earth dilutions. It further assists in the correct place suitable for agricultural activity.

Soil Moisture Testing

Soil Moisture Testing

Soil moisture content testing determines whether plants have enough water or are dehydrated. The most common soil moisture test involves evaporating moisture from samples at high temperatures.

Soil Moisture Testing

Soil moisture content testing determines whether plants have enough water or are dehydrated. The most common soil moisture test involves evaporating moisture from samples at high temperatures.

Physical Soil Testing

Physical Soil Testing

Physical soil testing provides for the examination of soil type and physical qualities such as texture, structure, and wetness. Testing of the texture and structure of soil further assists in precise irrigation and fertigation planning.

Physical Soil Testing

Physical soil testing provides for the examination of soil type and physical qualities such as texture, structure, and wetness. Testing of the texture and structure of soil further assists in precise irrigation and fertigation planning.

Specific Gravity Test

Specific Gravity Test

The specific gravity test is a soil testing method used for determining the ratio of the density of soil solids to the density of water. This soil testing method further provides insights into the soil’s mineral composition and compaction potential required for soil classification and engineering design.

Specific Gravity Test

The specific gravity test is a soil testing method used for determining the ratio of the density of soil solids to the density of water. This soil testing method further provides insights into the soil’s mineral composition and compaction potential required for soil classification and engineering design.

Dry Density Test

Dry Density Test

The conduct of a dry density test ensures assessing the mass of soil per unit volume in case it is completely dry. It further ensures the calculation of the degree of compaction achieved during construction, with the intention to stabilize and increase the load-bearing capacity of engineered structures.

Dry Density Test

The conduct of a dry density test ensures assessing the mass of soil per unit volume in case it is completely dry. It further ensures the calculation of the degree of compaction achieved during construction, with the intention to stabilize and increase the load-bearing capacity of engineered structures.

Atterberg Limits Test

Atterberg Limits Test

Atterberg limit test ensures evaluating the moisture content at different states if sol transition such as liquid, plastic, and solid. It is one of the impactful soil testing methods.

Atterberg Limits Test

Atterberg limit test ensures evaluating the moisture content at different states if sol transition such as liquid, plastic, and solid. It is one of the impactful soil testing methods.

Soil Compaction Test

Soil Compaction Test

Soil compaction test ensures measuring the soil’s ability to withstand applied loads and maintain its density over time. This method of testing further assists in determining the optimum moisture content and compaction effort required to achieve the desired soil density, long-term stability and performance of constructed structures.

Soil Compaction Test

Soil compaction test ensures measuring the soil’s ability to withstand applied loads and maintain its density over time. This method of testing further assists in determining the optimum moisture content and compaction effort required to achieve the desired soil density, long-term stability and performance of constructed structures.

Industries in Which Soil Testing is Required

Soil testing is a critical process needed in several industries. Have a look at the prominent industries in which soil testing is required in India-

 

Key Industries

  • Agriculture
  • Real Estate
  • Construction
  • Oil and Gas
  • Mining
  • Forestry

Other Industries

  • Horticulture
  • Floriculture
  • Renewable Energy
  • Hydropower
  • Waste Management
  • Pottery

Difference Between Soil Testing and Soil Sampling

The difference between soil testing and soil sampling are as explained below:

S. No. Aspect Soil Testing Soil Sampling
1 Meaning Soil testing is a chemical analysis which does not evaluate the soil’s physical properties. Soil sampling is a procedure where the sample is sent to the soil testing laboratory, representing a much greater volume of soil in the field/ garden.
2 Purpose The main purpose of conducting a soil test is to evaluate the properties and fertility level of the soil for agricultural/ environmental purposes. The main purpose of conducting a soil sample is to obtain representative soil samples for further testing or diagnostic.
3 Scope The scope of soil testing ensures a detailed examination of the characteristics of the soil samples sent through sampling. The scope of soil sampling is limited up to the physical act of collecting & sending soil samples to the diagnostic centre.
4 Tools Used Laboratory tools like pH measurement, nutrient analysis, and texture assessment techniques are used for the purpose of soil testing. Tools like soil core sampling tube, augers or probes are used for the purpose of collecting soil for further testing or diagnostic.

When to Conduct Soil Testing?

The process of soil testing must be conducted during the following circumstances as described below:

  • After harvesting or when the crop is standing
  • Once in every three years before the onset of the crop season
  • When moisture in the soil is least
  • For cropland and vegetable production, it is best to sample in the fall of the year
  • For pastures and perennial crops, it is best to sample during the late summer period
Conduct Soil Testing

How Does Corpbiz Help Simplify Soil Testing in India?

75% Market Share

75% Market Share

We are dominating the soil testing space with a 75% market share, the highest in the trade.

10+ Years of Experience

10+ Years of Experience

Our environmental specialists have 10+ years of solid experience in providing soil testing services.

Crop Monitoring Services

Crop Monitoring Services

Corpbiz crop monitoring effectively combines soil test findings with historical crop production data, tracking yield declines in one spot.

Implementation of Soil Testing Methods

Implementation of Soil Testing Methods

Our expert consultants have mastered the craft of implementing soil testing methods such as soil compaction test, soil moisture testing, dry density testing, etc.

Time-saving Approach

Time-saving Approach

At Corpbiz, we ensure that your valuable time will not be wasted while conducting soil testing.

Prevent Soil Degradation

Prevent Soil Degradation

Our environmental professionals have proved their mettle in extending support in preventing soil degradation with the help of our soil testing services.

Soil Sampling and Testing

Soil Sampling and Testing

Our Professionals at Corpbiz assist agriculturists in soil sampling and testing at the time of purchase of new fields or land.

Maintaining Long-Term Fertility

Maintaining Long-Term Fertility

Soil nutrient analysis helps to maintain long-term field fertility, directly contributing towards sustainable agriculture.

Facilitates Purchase of a New Field

Facilitates Purchase of a New Field

Soil samples and testing facilitate the purchase of a new field or determine the land use.

Frequently Asked Questions

Have a look at the answers to the most asked questions. 

A soil test is a chemical technique that ensures removing elements from soil (phosphorus, potassium, calcium, magnesium, salt, sulphur, manganese, copper, and zinc) and measuring their "plant available" amount within the sample.

Chemical analysis includes determining the soil's nutrient content, pH, and other chemical qualities. This may be accomplished by a variety of methods, including wet chemistry, spectroscopy, and electrochemistry. Physical analysis includes determining the soil's texture, structure, and other physical features.

The process for soil testing includes the following steps:
  • Find/Select Soil Testing Laboratory
  • Take Soil Samples for Testing
  • Submit Samples for Professional Analysis
  • Conduct Sample Analysis
  • Review Soil Test Report
  • Implementation of Soil Testing Findings
  • Making Fertilizer or Other Management Suggestions

Most soils have pH levels ranging from 3.5 to 10. Soils in heavier rainfall locations have a natural pH range of 5 to 7, but in dry places, it goes from 6.5 to 9.

Most plants grow when the soil pH ranges between 6.2 and 6.8. pH measures a material's acidity and alkalinity. The pH ranges from 0 (very acidic) to 14 (extremely alkaline), with seven being neutral and considered best for soil.

The soil testing is important in the current scenario to offer an accurate evaluation of the soil's fertility in order to provide fertilizer recommendations. With growing awareness of fertilizer's impact on environmental quality, soil testing may also be used to identify where fertilizers or manure should not be applied.

A soil with a calcium base saturation level of 65-75%, a magnesium level of 10-18%, and a potassium level of 35% gives the optimum possibility for all nutrients in the soil to be accessible, as well as strong soil structure, water-holding capacity, and microbial activity.

The soil testing program's primary goal is to provide farmers with a service that leads to improved and more cost-effective fertilizer usage as well as better soil management methods for increased agricultural productivity. The main objective of soil testing is to assess the fertility of soil.

Soil samples and analysis offer chemical and physical information on the soil's quality. Soil testing is the process of analysing soil samples to evaluate their properties, such as texture, stability, plant nutrients, fertility, acidity or alkalinity, toxicities, and pollutants.

Soil analysis refers to a series of chemical methods that evaluate not only the quantity of accessible plant nutrients in the soil but also the chemical, physical, and biological soil qualities that are significant for plant nutrition.

Moisture Content Test, Specific Gravity Test, Atterberg Limits Test, Dry Density Test, and Proctor’s Compaction Test are some of the popular types of soil testing methods/ techniques practiced in India.

The soil testing practice is based on the principles provided below:
  • Accurately determining the available nutrient status of the soils
  • A clear indication to the farmer seriousness of any deficiency or excess existing in terms of corps

Atterberg limits test is the most popular method used for the basic measurement of the critical water content of fine-grained soils. The test further includes shrinkage limits, plastic limits, and liquid limits, as outlined in ASTM D4318.

The soil testing further reveals chemical contamination, humic or organic matter, electric conductivity, cation exchange capability, and other physical and chemical features.

About the Author


NE
Neha Dawra

Legal Researcher

Written by Neha Dawra. Last updated on Jun 15 2026, 05:53 PM

Neha Dawra has 4+ years of experience in legal research and intellectual property advisory. Her expertise lies in analyzing IP laws, drafting structured legal content, and simplifying complex registration procedures into clear, simple insights.

 

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