1、Qualitative identification of nitrate nitrogen in compound fertilizers

In this study, NPK compound fertilizers containing nitrate nitrogen were tested by Fourier transform infrared spectroscopy (FTIR), and the relative contents of nitrate nitrogen and qualitative comparison were qualitatively identified.

2、Rapid and accurate determination methods based on data fusion of laser

In order to ensure the quality of compound fertilizer production and processing timely and effectively, and reduce the testing cost, it is necessary to develop new rapid and accurate detection methods for main elemental contents in compound fertilizer.

3、How to Identify Authenticity of NPK 14

This article introduces in detail how to identify the authenticity of the nitrogen, phosphorus and potassium 14-14-14 compound fertilizer, and provides professional skills and methods to help agricultural practitioners choose high-quality fertilizers to ensure the healthy growth of crops.

4、Method evaluation in total Nitrogen in solid fertilizers

Following an IFA internal membership request, the IFA Method Harmonization Working Group embarked on the process of identifying methods for recommendation as best practice on determination of Nitrogen content for nitrogen containing solid fertilizers.

5、Classification, composition and properties of major nitrogenous fertilizers

PDF | On Mar 31, 2021, Anil Kumar Singh published Classification, composition and properties of major nitrogenous fertilizers | Find, read and cite all the research you need on ResearchGate

Quantitative Analysis of Nitrogen in Compound Fertilizers

Quantitative analyses of the nitrogen concentration in compound fertilizer were performed using laser-induced breakdown spectroscopy (LIBS). Thirty-two samples were used as a calibration set, and eight samples were used as a validation set.

How to measure the nitrogen content of compound fertilizer?

This article will introduce how to measure the nitrogen content of compound fertilizer in the laboratory. This document is an internal document of...

EN 15749 – Determination of Nitrogen Forms in Compound Fertilizers Testing

EN 15749 outlines a standardized method for determining the content of different nitrogen forms in compound fertilizers. The test involves a series of chemical reactions and instrumental analysis to quantify the concentration of various nitrogen compounds.

Determination of nitrogen in solid and liquid fertilisers

The addition of nitrogen increases crop yields but too much nitrogen can have a negative impact on the environment and on the quality of the products. A good balance must be found, and this is possible only by knowing the exact nitrogen content of the fertilizers used.

Quantitative Analysis of Nitrogen in Compound Fertilizers

Quantitative analyses of the nitrogen concentration in compound fertilizer were performed using laser-induced breakdown spectroscopy (LIBS). Thirty-two samples were used as a calibration set, and eight samples were used as a validation set.

How to Identify the Quality of Compound Nitrogen Fertilizers

Determining the quality of compound nitrogen fertilizers requires a comprehensive evaluation of multiple indicators. The following are key factors to consider:

1. Visual Inspection:

   • Check whether the packaging is intact and undamaged, and ensure label information is clear and legible.
   • Observe whether the fertilizer’s color, shape, and texture are uniform and consistent.
   • Inspect for foreign materials or impurities, such as inadequately mixed particles or plastic debris.

2. Content Labeling:

   • Verify that the nutrient content stated on the packaging complies with national standards, such as specific percentages of nitrogen (N), phosphorus (P), and potassium (K).
   • Ensure the nutrient ratios listed on the label match the actual contents and lack misleading information.

3. Component Analysis:

   • Use chemical analysis to determine the concentrations of primary chemical components in the fertilizer.
   • Understand the mechanisms of different ingredients and their impacts on crop growth.

4. Physical Properties:

   • Test the fertilizer’s solubility and flowability to ensure rapid dissolution during application, facilitating soil absorption.
   • Assess its stability under varying humidity and temperature conditions to prevent performance degradation.

5. Harmless Treatment:

   • Confirm whether the fertilizer has undergone harmless treatments, such as heavy metal passivation or degradation of organic pollutants.
   • Ensure the product does not pose environmental or health risks during application.

6. Environmental Protection Standards:

   • Verify compliance with national environmental requirements, such as zero volatile organic compound (VOC) emissions and avoidance of soil acidification.
   • Evaluate post-application environmental impacts, including effects on groundwater and surrounding ecosystems.

7. Brand Reputation:

   • Prefer products from well-known brands, which often have stricter quality control and better after-sales service.
   • Refer to user reviews and feedback to gauge market reputation.

8. Price Comparison:

   • Compare prices of similar products to assess cost-effectiveness.
   • Avoid being lured by low-quality, inexpensive options that could harm crop growth and yield.

9. Application Effects:

   • Conduct small-scale trials to observe crop growth and yield performance.
   • Record data on soil conditions, crop cycles, and pest/disease occurrences after fertilization.

10. Ongoing Updates:

    • Stay informed about advancements in agricultural technology and new fertilizer varieties, as compound nitrogen fertilizers continually evolve.
    • Regularly follow industry trends and research updates to better meet agricultural needs.

a holistic assessment of the above factors can effectively judge the quality of compound nitrogen fertilizers. Given the diversity of these products, it is advisable to consult professionals or select formulations tailored to specific crop requirements and soil conditions before use.