Soil testing: the hidden key to maximising your yields

Soil testing has a long history dating back to the 19th century, when methods were developed to assess soil nutrient levels. Over time, these methods have become more sophisticated, incorporating tests of micronutrients y pH. Today, with technologies such as the DNA sequencingIn this way, the microbes present in the soil can be identified, allowing for more precise soil management strategies.

The process involves collecting soil samples from different areas of a farm and sending them to laboratories for analysis. These analyses provide crucial information on the microbial activitypH, the pH, the nutrients and the organic matter of the soil.

Ultimately, these analyses provide farmers with data that allow them to make informed decisions on how to manage their soil, which improves crop yields and overall soil health.

Importance of the analyses

Soil testing is essential in agriculture to determine nutrient levels and to ensure that the soil is healthy growth of plants and a high performance of crops. Farmers sample their soils annually and evaluate the results to identify nutrient deficiencies or excesses.

This allows them to adjust fertiliser application and other soil management practices to maintain a proper balance. Avoiding excessive fertiliser application helps prevent environmental problems such as water pollution, while promoting healthy soil conditions for crop growth.

The advantages of soil testing are diverse and fundamental for agriculture:

1. Improving crop yields: They identify nutrient deficiencies or imbalances that can limit plant growth and yields, allowing fertilisation practices to be adjusted to optimise crops.

2. Reduction of fertiliser costsThey help to avoid over-application of fertilisers, which reduces costs and avoids negative impacts on the environment.

3. Improving the soil healthThey provide valuable information on soil health, such as organic matter content, pH and texture, allowing proper management to improve soil structure, nutrient cycling and water retention.

4. Precision farmingThey identify areas with different soil characteristics and nutrient needs, facilitating more targeted fertilisation and other farm management practices.

5. Environmental protectionBy avoiding over-application of fertilisers and other soil amendments, they reduce the risk of nutrient run-off and associated environmental problems.

What types of soil testing are there?

Soil testing covers a wide range of physical, chemical and biological aspects that are crucial for understanding and improving soil quality and crop yields:

1. Soil physical analysisThey evaluate the structure, texture and other physical characteristics such as density, permeability, porosity, temperature and stability of the aggregates. These aspects are related to nutrient and water retention, water infiltration and compaction.

2. Soil chemical analysisThey include tests for pH, phosphorus, potassium, magnesium, magnesium, calcium and other nutrients, as well as the bioavailability of macronutrients and micronutrients. They also assess organic matter and cation exchange capacity (CEC), important for retaining nutrients and preventing soil acidification.

3. Total nutrient digestion (TND)Measures the net value of the soil in terms of nutrients, providing a comprehensive view beyond what is "available" in the extract tests.

4. Soil pH/acidity and salinity testsThey determine soil pH and salinity levels, which affect nutrient uptake, productivity and crop growth.

5. Haney testsSoil health parameters: Developed by Dr. Rick Haney, they assess various parameters of soil health, such as the nutrient availabilityThe pH, pH, microbial activity and organic matter.

6. PLFA tests: They analyse phospholipids in the cell membranes of soil micro-organisms, providing information on functional groups of organisms.

7. Microscopy: Allows examination and study of the diversity of micro-organisms present in the soil, including bacteria, fungi, protozoa and nematodes.

8. Biological soil analysisThey assess biological activity and microbial diversity, detecting disease risks, blockages in nutrient cycling and functions such as bioremediation and water management.

Biological soil analysis

Biological soil analysis represents one of the most innovative tools for understanding the microbiological balance of the soil ecosystem. Through genetic sequencing, soil DNA analysis allows the detection of microbial communities, their diversity, their functionality and their role in key processes such as nitrogen fixation, phosphorus solubilisation or pathogen suppression.

This information goes far beyond the available nutrients, as it assesses the actual capacity of the soil to support regenerative agriculture.

In addition, technologies such as BeCrop Tests allow comparison of microbial profiles from different plots with a global database, generating a diagnosis of soil health and proposing specific strategies for each crop, soil and climate.

Soil analysis queries

Before conducting any analysis, it is key to establish the agronomic objective of the consultation. Are we looking to correct deficiencies? Prevent diseases? Optimise water use? Each approach requires specific tests. For this, technical advice is essential. In many cases, an integrated approach combining chemical, physical and biological soil analysis is recommended.

In addition, the most frequent queries revolve around:

• What type of analysis is most suitable for horticultural, fruit or field crops?
• How to interpret the microbial activity index?
• What to do if low functional biodiversity is detected?

These queries can be resolved with the accompaniment of a specialised technician and the use of advanced platforms that integrate sensor data, remote sensing and laboratory analysis.

Soil tests: how to choose the right one?

The choice of soil tests will depend on the phenological timing of the crop, field history and production objectives. In general, it is recommended:

• Standard tests (pH, conductivity, macronutrients) before sowing.
• Biological tests at times of less intervention (post-harvest or fallow).
• Physical testing for infiltration, compaction or waterlogging problems.

A smart strategy is to integrate these trials into a precision farming system, using yield maps and field sensors to target decisions.

An indispensable tool for every agronomist

In summary, soil testing is a essential tool for farmers to assess the health and productivity of their crops. By examining soil texture, structure and nutrient content, farmers can make informed decisions about management practices such as irrigation, fertilisation and soil amendment.

The results of soil analysis are also useful for identify potential soil health problems y developing improvement plans to optimise crop yields and long-term sustainability. Whether it is a basic soil analysis or a biological assessment as a BeCrop Testinvesting in soil testing is crucial for improving soil health and farm success.