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Fertilizers

Fertilizers are widely studied in modern agriculture as they have an important impact on soil fertility and crop productivity. Their chemical composition must be monitored to ensure efficiency, environmental safety, and compliance with regulatory standards.

VELP offers robust analytical solutions for the characterization and quality control of organic and inorganic fertilizers. Designed for laboratories, research centers, and production sites, our instruments help optimize formulations and monitor key parameters with ease and accuracy.

We support public and private entities in:

  • Elemental analysis for CHNS determinations
  • Kjeldahl analysis for the determination of nitrogen, ammonia, and other forms of nitrogen
  • Solvent extraction for sulfur quantification

Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!
Carbon and Nitrogen determination in liquid fertilizers
Detecting the carbon and nitrogen content in liquid fertilizer is essential to maintain the expected yields and ensure a healthy crop. The CN 802 Carbon/Nitrogen Analyzer is designed to deliver precise and accurate measurements of carbon and nitrogen content in environmental and agricultural samples.
Analytical Instruments
Elemental analyzers
Characterisation of different nitrogen forms in liquid fertilizers
Characterizing the nitrogen forms in liquid fertilizers is essential for understanding their nutrient content, availability, and potential effects on crops and the environment. Indeed, different forms of nitrogen are taken up by the plants in different ways, thus characterizing the type of nitrogen contained in fertilizers is crucial to develop the most efficient fertilizing program.
Analytical Instruments
Distillation Units
Guidelines for choosing the correct Velp Kjtabs in Kjeldahl Analysis
The digestion phase is the most time-consuming step of the Kjeldahl analysis. Speeding up the process and ensuring a proper outcome is of fundamental importance when it comes to efficiency in the laboratory.
VELP designed seven different types of accurately pre-dosed KjTabs™ tablets to speed up the mineralization process. Along with catalysts, VELP produces antifoaming KjTabs™ to reduce foam formation during the initial phase of the mineralization process.
Analytical Instruments
ConsumablesDigestion Units
N/Ammonia Determination in Fertilizers - Kjeldahl Method
Healthy plants often contain 3 to 4 percent nitrogen in their above-ground tissues. This is a much higher concentration compared to other nutrients. Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis).
Analytical Instruments
Distillation Units
N/Protein Determination in Liquid Fertilizers - Dumas vs Kjeldahl Method
A fertilizer is any type of organic or inorganic substance that contains nutrients, macroelements or microelements, in forms assailable by plants, to maintain or increase the content of these elements in the soil, improve the quality of the substrate at the nutritional level, stimulate the vegetative growth of the plants, etc.
Analytical Instruments
Digestion UnitsDistillation UnitsElemental analyzers
SER 158 - Sulphur in Fertilizer
Sulphur is one of the 17 essential plant nutrients. It is essential for the growth and development of all crops, without exception. Like any essential nutrient, sulphur also has some key functions in plants
Analytical Instruments
Solvent Extraction
Total Nitrogen Determination in Solid Fertilizers
Solid Fertilizers are substances containing the main chemical elements needed to improve the growth and productiveness of crops. It is therefore essential to determine the Nitrogen content of solid fertilizers. The Dumas method is one of the most common analyses to determine Nitrogen in fertilizers, following AOAC 993.13.

 
Analytical Instruments
Elemental analyzers
Total Nitrogen determination in Urea – Dumas vs Kjeldahl Method
Urea is a crystalline substance widely used as a fertilizer, feed supplement, and starting material for plastics and drugs. It has a very high nitrogen content; it is readily converted to nitrate in the soil and is therefore considered one of the most concentrated nitrogenous fertilizers. The importance of having a controlled Nitrogen content in this product is crucial to always keep the same production standards.
Analytical Instruments
Digestion UnitsDistillation UnitsElemental analyzers
Poster On OXITEST - Effect of Nitrogen Fertilisation on Walnuts
Download the poster entitled "Effect of nitrogen fertilisation rates on the content of fatty acids, sterols, tocopherols and phenolic compounds, and on the oxidative stability of walnuts".
Analytical Instruments
Oxidation Stability Reactor
VELP Scientifica Srl
Via Stazione, 16
20865 Usmate (MB) - Italy
Tel. + 39 039 628811
VELP Scientific, Inc
40, Burt Drive, Unit #1, Deer Park
NY 11729 - U.S.
Tel. +1 631 573 6002
VELP China Co. Ltd.
Room 828, Building 1, No.778 Jinji Road
Pudong New Area, Shanghai, China
Tel. 400-089-8029

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