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Soil Testing & Nutrient Analysis

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  • By The Biologic Team
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Soil Testing & Nutrient Analysis

It all starts with soil. Whether you’re growing six plants or farming multiple acres, understanding the chemical makeup of your soil provides critical insight into how your nutrients are cycling and the health of your soil from season to season. To be completely informed you need to know two things: what is available to your plants easily and immediately, and what the total nutrient reservoir of the soil is. The first question can be answered with a Saturated Paste Test, the other with a Standard Soil Test. At Biologic we recommend the Complete Soil Analysis which includes both the Saturated Paste and Standard Soil tests. We also offer a third-party custom recommendation service to help you interpret your test results and create a soil fertility plan based on your unique requirements.

Soil Analysis Packages:


Basic Soil Analysis 

pH, organic matter, total exchange capacity, sulfur, phosphorous, calcium, magnesium, potassium, sodium, boron, iron, manganese, copper, zinc, aluminum, % base saturation Ca,Mg, K, Na


Complete Soil Analysis (Basic Soil Analysis PLUS Saturated Paste Test)

The Basic Analysis PLUS

Soluble: salts, chloride, bicarbonate, water soluble phosphorous, calcium, magnesium, potassium, sodium, boron, iron, copper, zinc, aluminum, sulfur, manganese, sodium absorption ratio


Standard Water Test 

pH, hardness, conductivity, salt concentration, sodium adsorption ratio, calcium, magnesium, potassium, sodium, iron, carbonate, bicarbonate, chloride, sulfur, boron


CUSTOM Recommendations & Application Rates           

Have your results reviewed by a soil engineer who will provide specific recommendations and application rates to shift your soil to meet your goals. Please note that this service is only available for the Complete Soil Analysis.


Soil Sampling Instructions

If a soil test is to be a reliable guide for the addition of fertilizers or lime, the sample tested must represent the soil condition of the area sampled. The specific purpose of the test must be kept in mind, and the completeness of the test desired. Read and follow applicable instructions carefully, the laboratory results will tell you only what is in the sample you send. It is the sample taker’s responsibility to take a truly representative and unbiased sample of the field area in question. 

1. Soils that differ in soil type, appearance, crop growth, or past treatment should be sampled separately, provided the area can be treated separately. A soil map or crop response map can be of help in distinguishing areas and in recording location of samples. 
2. Several different tools – such as an auger, a soil sampling tube, or a spade may be used in taking soil samples.
3. Scrape away surface litter. If an auger or soil sampling tube is used, obtain a small portion of soil by making a boring about 6 inches deep, or if plowing or tilling deeper, sample to tillage depth. If a tool such as a spade is used, dig a V-shaped hole to sample depth; then cut a thin slice of soil from one side of the hole.
4. Avoid areas or conditions that are different, such as areas where fertilizer or liming materials have been spilled, gate areas where livestock have congregated, poorly drained areas, dead furrows, tillage or fertilizer corners, or fertilizer band areas of last year’s crop. It is also advisable to stay at least 50 feet from barns, roads, lanes or fence rows.
5. Because of soil variations, it is necessary that each sample consist of small portions of soil obtained from approximately 15 locations in the soil area. After obtaining these portions of soil, mix them together for a representative sample. Samples can be sent dry or wet. Place 2 cups of soil in a soil sample bag or ZipLoc bag. Where soil is very varied and especially where land leveling has been done, or erosion and deposition are severe, the field should be checked on a grid or incremental unit basis.
6. After the sample has been taken, the soil sample bag should be clearly marked with your name, your address, and the sample ID on the outside of the soil bag. Make sure bags match Submission Worksheet. Keep a record for yourself of the area represented by each sample.


Related Content: 


Soil Sample Intake Sheet


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