Calibration and interpretation of soil testing

Calibration and Interpretation of Soil Testing Results

Calibration and interpretation of soil testing is probably the biggest challenge for soil fertility management. The results of soil tests must be calibrated according to the response of the crops as a result of the use of the relevant phytonutrients.

This information is obtained from field experiments on different types of soil and greenhouse fertility experiments. The yield reaction obtained from the ratio of applied nutrients may then be related to the number of nutrients present in the soil.

Soil testing results must be properly calibrated and interpreted to get an exact understanding of the soil fertility level and presence of contaminants. Any mismanagement or human error can result in problematic soil testing results and the addition of inputs or fertilizers according to these results may cause yield losses and poor quality food produce.

Importance of calibration and interpretation of soil testing

The results of long-term soil test titration studies on different soil types are used to determine the phytonutrients recommended for application in a particular crop at a specific soil test level. For example, if the soil test P level is in the range of 0-10 ppm (it is low), then the recommended P for maize production at 150 mc/acre may be P2O5 per 100 lbs/acre.

However, if the soil test level is above P 40 ppm (too high), the recommendation may be 0 to 20 pounds per acre. All kinds of soil samples testing require calibration and interpretation of soil testing results to optimize the use of fertilizers for soil fertility.

In this example, on the right, more than 85% of the fields tested on a very small percentage of specific phytonutrients may respond to a lucrative yield of additional nutrients. At a very high level of phytonutrients, there is only a 15% chance of increasing profitable production of additional nutrients.

These values ​​are arbitrary, but they show the idea of ​​expecting an answer. This calibration and interpretation of soil testing may be a difficult task so you can search for soil testing near me to get soil testing services. Soil testing results are a reliable source of soil fertility and plant nutrition management and help to optimize crop production and food security.

Location-related management tools for soil testing calibration and interpretation

Location-related management tools now allow farmers to manage more cohesive areas in the fields. Some of these areas have higher efficiency than databases where most of the available soil tests are calibrated. The lack of calibration for high-yield areas is one of the factors that has sparked interest in using satellite global positioning of production screens and tape tests to determine the abundance of soil fertility programs.

The new EG Micro Tools can develop algorithms that allow multiple site-specific regions to be managed in single domains. This means that a balanced crop feeding recipe can be spread over every square foot in every field. Calibration and interpretation of soil testing results are also important to know about what factors contribute to soil fertility and how to restore soil fertility.

Correlation vs Titration for calibration and interpretation of soil testing

Correlation and titration are terms that scientists use to classify the research required to develop a soil experiment. The difference between correlation and titration is explained below.


Correlation is the relationship between the number of nutrients extracted from the soil by laboratory tests and the nutrients produced by plants and/or crops in a greenhouse or field. If such a relationship cannot be established, the chemical method has little or no benefit.

Sometimes this relationship can only be based on a single nutrient and a specific crop group and soil. If this limitation is known and accepted, soil testing should only be used for these limited conditions. Well-designed and better correlation studies are required to manage quality agricultural production. So growers must check the reliability and expertise level of soil testing experts to get accurate soil testing results.


Titration is a method of establishing a relationship between the value of a particular soil test and the response to adding nutrients to the soil as fertilizer. The data in Table 9.2 gives alfalfa grass produced from multiple phosphorus ratios applied when the soil phosphorus level for this study was eight parts per million. Such field tests are repeated when the phosphorus level in the soil is between 2 and 30 ppm.

The maximum amount to apply P2O5 to this site will be 60 to 80 pounds per acre. However, many tests are needed to make general recommendations for the region. When conducting similar experiments in multiple locations, analysis of crop interaction allows researchers to estimate the fertilizers needed at different levels of phosphorus in the soil. The result of the calibration effort is to determine the amount of phosphorus fertilizer on different soil surfaces to achieve maximum yield.

Soil test titration is a specific soil analysis procedure and is regarded as an efficient way among all soil testing methods, soil testing procedure, soil analysis techniques, chemical soil test, and simple soil testing methods. However, it is significantly important to know how to analyse soil samples, generated from soil test analysis and different types of soil testing methods. Soil test interpretation guide is an ideal way to get a proper understanding of all standard procedures and their interpretation. This guide is being used by the researchers, and agriculture extension workers to improve the quality of soil testing results.

Correlation and Titration for calibration and interpretation of soil testing

By combining correlation research with titration, we can predict the probability of a reaction using a particular nutrient. In addition, we can recommend the best possible fertilizer to ensure the most economical return. As the price of a particular crop and the price of fertilizer change, recommendations for the same soil test price may change over time.

The soil test report must be properly analyzed by using correlation, calibration, and interpretation of soil testing results. It will give a basic understanding of the level and type of nutrients in the soil and farmers can greatly optimize the nutrient use efficiencies and crop production potential by multiple times. Similar Physiology of Nutrients Accumulation and Factors Affecting


By performing several of these experiments, scientists can determine the yield potential at a given soil level and the amount of fertilizer needed to make this discovery. Depending on factors other than soil test levels, the response of crops to any soil test surface will vary greatly. Also Like: Role of Zn for Life and Zn

The correct interpretation of soil test results includes other management factors such as risk, climate, and economy. Without a research database, these recommendations would not be possible, and the maximum economic return would not be possible.

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