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Soil Analysis

What Soil analysis provides

The soil environment where plants grow can be divided into 3 characteristics: physical attributes, biological attributes and chemical attributes. Soil analysis mainly indicates the chemical condition of the soil.

Careful observation can reveal plants’ mineral deficiency and excess symptoms, however there are some cases where it is not easy to diagnose plants’ symptoms, such as a case of the difference between physiological disorder and disease and a case of a plants’ potential deficiency symptom when the plants are not on the surface.
Even a deficiency symptom is found, it is difficult to determine the exact volume to cure the deficiency. There is only information available to help, which is formulated from personal experience and observation.

Fir the reasons stated above, a limited number of people can diagnose the chemical condition of soil. However, because soil analysis provides objective figures on the chemical condition of soil, a layperson can find both deficiency symptoms and excess symptoms. Moreover, the software for fertilizer application planning (which is the information bank obtained from experience, mentioned above) which allows you to understand the level of symptoms and to calculate necessary volume of fertilizer to be applied.

Soil analysis is an effective way to check the chemical conditions in the soil and there are many cases where plants grow well after soil analysis was introduced.
Please do not misunderstand that soil analysis can assure everything needed for healthy plants. The physical and biological conditions for plants need to be controlled in addition to the soil’s chemical condition. It is possible that the plant cannot root and absorb nutrition in the soil even though each nutrient element is balanced in the soil. This is why it is also necessary to pay attention to improving the physical and biological conditions for plants as well as for chemical conditions for the soil.

Timing needed for soil analysis

Usually one month is required to get a result from the time of taking the soil from the farm and sending the soil to our office for analysis.

The time needed for soil analysis is divided in to 2 parts s such as before basal fertilization and before additional fertilization (i.e. before and after planting, respectively).

For basal fertilization, you can prepare the time for soil analysis depending on the plant and the planting plan. However, unfortunately frequently farm producers do not have enough time for soil analysis. For additional fertilization, no farm producer can wait for one month. If they wait for one month they will miss the window of opportunity for additional fertilization.

It would be better if there were a shorter turn around time for the soil analysis process but this is not the current situation.

We recommend farm producers use simple analysis equipment they can handle to shorten the time. The soil analysis equipment allows them to obtain a result within a half day in the quickest case and it can be used anytime such as for both basal and additional fertilization.

Accuracy of soil analysis

Simple analyzing equipment may be less accurate than results prepared at a laboratory, however a small difference which does not affect the fertilizer volume is not a problem because farm producers are interested in fertilizer volume not in the data figures.

Analyzing equipment

Dr. Field (Dr. Soil, digital indicator, pH meter, EC meter)

Analyzing items available

Analyzing ItemAnalyzing ElementRangeUnit
EC-0~20mS
pH(H2O)-3.0~9.0-
pH(KCl)-3.0~9.0-
ammonia nitrogenNH4+−N1~25mg/100g(N)
nitrate nitrogenNO3−−N1~50mg/100g(N)
phosphoric acidP5~150mg/100g(P2O5)
potassiumK1~150mg/100g(P2O5)
calciumCa50~1000mg/100g(CaO)
magnesiumMg1~150mg/100g(MgO)
ironFe5~100ppm(Fe)
manganeseMn5~100ppm(Mn)
salt contentCl0.002~0.200%(NaCl)



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