Soil Testing, Plant and Water Analyses Laboratory - University of Liberia

Yesterday, March 7, 2025, a team of Soil Expert from theSoil Testing, Plant and Water Analyses Laboratory - University of Liberiaf Liberia honored a request from the management of Peter’s Farm in Harrisburg, Montserrado County, to collect soil samples for different parameters analysis.

The site sampled occupied a space of 150 acres (60 Ha) of farmland and the sample collection will last for three days. The soil sample will be collected at a depth of 30 cm and eight (8) samples will be collected to represent the entire farmland.

Upon completion, the samples will be packaged and brought to the lab for analysis. The management requested a physicochemical analysis to be done on the entire samples and those physicochemical analyses include:

👎
(K)
(P)
/Salt (TDS)


(SOC)

(%MC)

(EC)
(SOM), etc.

The purpose of the analysis is to determine the deficiency, Sufficiency, and Toxicity of the soil's essential nutrients and how water, air, and microorganisms are retained in the soil, and to recommend if the soil needs to be amended to support agricultural productivity.

Role of Soil Testing in Fixing Plant Nutrition Deficiencies

Soil testing provides farmers and agronomists with essential insights into the nutrient status of their soil, enabling them to address deficiencies before they impact crop health and yields. Let’s explore the critical role soil testing plays in remedying plant nutrition deficiencies and optimizing crop yield:

1️⃣ Accurate Diagnosis of Nutrient Deficiencies

Visual symptoms of nutrient deficiencies, such as yellowing leaves or stunted growth, can sometimes be misleading or overlap with other issues like pest damage or water stress. Soil testing helps identify the precise nutrient levels in the soil, allowing for accurate diagnosis and targeted interventions. For example, soil tests can distinguish between nitrogen and sulfur deficiencies, which often present similar symptoms.

2️⃣ Optimizing Fertilizer Applications

Without proper soil testing, applying fertilizers can be a guessing game, leading to over-application of some nutrients and under-application of others. Soil tests reveal nutrient imbalances, ensuring that fertilizers are applied at the right rates. This not only corrects deficiencies but also prevents nutrient toxicity and reduces input costs.

3️⃣ Preventing Long-Term Soil Depletion

Continuous cropping without understanding the nutrient status of the soil can lead to long-term depletion of essential nutrients. Regular soil testing provides insights into nutrient trends over time, allowing farmers to take corrective measures before deficiencies become severe. Long-term maintenance of soil fertility leads to sustained productivity over multiple growing seasons.

4️⃣ Tailoring Nutrient Management to Specific Crops

Different crops have different nutrient requirements, and soil testing helps tailor nutrient management practices accordingly. By understanding the nutrient needs of specific crops, farmers can ensure that their crops receive the appropriate nutrients at critical growth stages. For example, soil testing can reveal if additional phosphorus is needed for root development in crops like maize or soybeans.

5️⃣ Best Practices for Soil Testing

Conduct regular soil tests at least once a year or between growing seasons to track changes in soil fertility. Combine soil testing with plant tissue testing to get a full picture of nutrient availability and plant uptake. Based on soil and plant tissue test results, use fertilizers and soil amendments that specifically address nutrient deficiencies and imbalances.

In conclusion, soil testing is an indispensable tool for remedying plant nutrition deficiencies. By adopting a data-driven approach to nutrient management, farmers and agronomists can improve yields, reduce input costs, and contribute to more sustainable farming practices.

Credit:

Ministry of Agriculture Liberia
UNDP Liberia
University of Liberia - UL
International Institute of Tropical Agriculture (IITA)
4-H
Soil and Water Research
CTA - Technical Centre for Agricultural and Rural Cooperation
Soil Testing, Plant and Water Analyses Laboratory - University of Liberia

Today, January 18, 2024, a team of soil scientists from the Soil Testing, Plant, and Water Analyses Laboratory at the University of Liberia concluded a two-day visit at the Mina’s Farm, Grand Bassa County.

The purpose of the visit was to collect soil samples and water samples from the farm in order to gather information about the soil physicochemical properties of the farm including its available essential nutrient contents and the need for specific fertilizer application and amendments, and to identify the micro bacteria in the soil and water.

To ensure a clear representation of the entire farm, which is about 100 Acres of land, we collected samples randomly from all angles of the farm. Varies samples were taken at different depths 15cm, 25cm, and 30cm respectively in randomly selected agricultural regions across the farm.

The collected samples will allow the creation of a digital map of the soil types, and the available microorganisms in different zones of the farm, and the essential nutrient analyses will also be present to indicate the point of sufficiency and deficiency of available nutrients at different areas of the farm.

Soil and Water Research
Soil Testing, Plant and Water Analyses Laboratory - University of Liberia
’s_Farm
Ministry of Agriculture Liberia
University of Liberia - UL
UNDP Liberia