Soil analysis helps not only to make important decisions, but also the right decisions regarding the management of your crop.

Cation exchange capacity (CIC) The CIC is the number of negatively charged sites on soil particles (mostly clay and organic matter) that can retain nutrients for plants. It is expressed in units of meq / 100 g or cmolc / kg (1meq / 100 g = 1cmolc / kg).

Positively charged nutrients, such as potassium, calcium and magnesium are electrically attracted to the clay particles in the soil.

Other positively charged elements, such as sodium and hydrogen are also adsorbed on the soil particles. Sodium can adversely affect the structure of the soil and hydrogen ions determine the pH of the soil. Soils that have higher CIC are considered to be more fertile than soils with low CIC, since they can potentially contain more nutrients for a longer period of time.

These soils also have a higher water retention capacity. The knowledge of the CEC of your soil can help you decide the frequency of fertilizer application, since soils with high CEC require less frequent applications.

Organic material

Soil organic matter represents the organic components of the soil.
Most are plant and animal waste. Organic matter contributes to soil structure, fertility and water retention capacity. Soils rich in organic matter (4-5%) will be more fertile than the rest. The organic matter feeds nitrogen, phosphorus and sulfur to the crop.


It means the absorption rate of sodium. It is used to predict the problems of water infiltration in soil problems and soil structure. RAS is the ratio of sodium to calcium plus magnesium in the soil solution. Soils with RAS greater than 10 are considered sodic soils. Sodic soils have structural problems, which result in poor water infiltration.

The soil tends to swell when wet and fill with cracks when it dries.

SAR = Na (meq / l) / √ (ca (meq / l) + Mg (meq / I)) / 2


Soil pH is one of the most important parameters in the analysis report of your soil. The soil pH level can tell you a lot about the potential availability of nutrients to plants and the possible toxic effects of other elements (such as aluminum).

Soils with pH greater than 7.0 are considered alkaline soils. Micronutrient deficiencies, such as iron deficiency, are common in these soils.

Crops growing on soils with a pH below 5.5 may show symptoms of metal toxicity (eg, iron, manganese) and deficiencies of other nutrients, such as magnesium. The liming of the floor is recommended above all in this type of floor. The pH range of the ideal soil for most crops is between 5.8 and 6.5, an interval in which most nutrients are available for crops to accept.

CE (Electrical Conductivity)

CE is the abbreviation for electrical conductivity. It is a measure of soil salinity.

EC is commonly measured in the soil solution. The expression units are usually ds / m, mmho / cm or microsimens / cm, where 1 ds / m = 1mmho / cm = 1000 S / cm. EC is one of the simplest ways to evaluate fertilizer levels in the soil, yield potential and soil salinity status and suitability for the crop that grows in it. Different crops have different levels of tolerance to salinity. Above a certain threshold, performance will decrease. The reduction in performance is proportional to the increase in the CE level.

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