1、Classification of nitrogen fertilizers

Production of nitrogen fertilizers Nitrogen fertilizers are produced by binding atmospheric nitrogen [N2] by any one of the following process.

2、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

3、Nitrogen fertilization and soil nitrogen cycling: Unraveling the links

Here, we conducted a five-year field experiment and collected 54 soil samples from three 0–4 m boreholes across different treatments: control, N-addition (nitrogen fertilizer) and NPK-addition (combined application of nitrogen, phosphorus and potassium fertilizers) treatments.

Types of Nitrogen Fertilizers: Complete Guide for Crops & Soil

This guide explains the main types of nitrogen fertilizers—including urea, ammonium nitrate, ammonium chloride, ammonium sulfate, liquid nitrogen solutions, controlled-release fertilizers, and organic nitrogen sources—highlighting their characteristics, soil behavior, and practical applications.

Nitrogenous Fertilizers and their Characteristics

Uses: This fertilizer is used for all crops and is suitable for application to all types of soil. It may be applied prior to sowing, at sowing time or as top dressing.

Classification Methods of Nitrogen Fertilizers

This article details the classification and selection methods of nitrogen, phosphorus and potassium (NPK) fertilizers to help readers understand the characteristics and uses of each fertilizer and provide practical suggestions for selecting NPK fertilizers.

Types of nitrogen fertilizers and their applications in agriculture

Nitrogen fertilizers mainly include three types: ammonium nitrogen fertilizer, nitrate nitrogen fertilizer, and amide nitrogen fertilizer. Ammonium nitrogen fertilizer is more easily adsorbed by soil colloids and is more prone to volatilization in alkaline environments.

Global crop

The N fertilization data was segmented by 21 crop groups, 13 fertilizer types, and 2 fertilization placements. Comparison analysis showed that our dataset is aligned with previous estimates.

Nitrogen fertilizer classification using multivariate fingerprinting

Results present the possibility to correctly (94%) classify N fertilizers using multivariate fingerprinting with linear discriminant analysis.

How to Choose Nitrogen Fertilizer Types Based on Crops and Soil

Learn how to choose the right nitrogen fertilizer types based on crop needs and soil conditions to improve nutrient efficiency and crop performance.

Nitrogen fertilizers are categorized into the following types based on soil characteristics:

1. Ammonium Nitrogen Fertilizers: This type primarily reacts with soil hydroxides to produce ammonia gas, which is then absorbed by crops. Examples include urea, ammonium nitrate, and ammonium chloride. The advantage is rapid absorption and quick efficacy, but the downside is high volatility, leading to reduced effectiveness.

2. Nitrate Nitrogen Fertilizers: These react with soil carbonates to generate carbon dioxide and ammonia for crop uptake. Examples include calcium nitrate, potassium nitrate, and ammonium nitrate. They offer prolonged efficacy but require longer absorption times and may accumulate in soil, diminishing their effects.

3. Amidated Nitrogen Fertilizers: These react with soil bicarbonate ions to release carbon dioxide and ammonia. Examples are ammonium sulfate, ammonium phosphate, and ammonium chloride. Similar to ammonium fertilizers, they provide fast absorption but suffer from volatility and reduced efficacy.

4. Urotropine-Based Fertilizers: Produced by reacting urea with formaldehyde to form urotropine, which then generates ammonia via reactions with soil hydroxides. While highly efficient, their production generates significant wastewater and emissions, posing environmental risks.

5. Bio-Organic Fertilizers: Microorganisms convert organic matter into nitrogen for crop absorption. Examples include green manure, compost, and biogas fertilizer. They improve soil structure and organic content but have lower efficacy and require larger application rates.

6. Slow-Release Nitrogen Fertilizers: Formulated with slow-release agents to delay nitrogen release. Examples include controlled-release urea and calcium nitrate. They extend fertilizer duration but are costly and slower to act.

7. Water-Soluble Nitrogen Fertilizers: Highly soluble in water for rapid crop uptake. Examples include sodium nitrate, potassium nitrate, and magnesium nitrate. They reduce application costs and act quickly but are temperature-sensitive and slower-acting.

8. Chelated Nitrogen Fertilizers: Formed by bonding nitrogen with metal ions (e.g., iron, copper, manganese). Examples include chelated calcium, magnesium, and zinc. They enhance nutrient absorption and yield but are expensive and challenging to mix with other elements.

each nitrogen fertilizer type has distinct strengths and weaknesses. The choice should align with soil conditions and crop needs. Rational application, combined with optimal timing and methods, improves nitrogen use efficiency, reduces environmental pollution, and supports sustainable agriculture.