1、Optimal timing and rate of nitrogen fertilizer use: An integrated

We use this framework to estimate nitrogen fertilizer application inefficiency and to determine the optimal rate and timing of fertilizer application. We apply this framework to wheat production at the field scale, using an agronomic simulation model calibrated to experimental data from Australia.

2、Optimum fertilizer application rate to ensure yield and decrease

Optimum dose of nitrogen and the average yield and global warming potential (GWP) under different nitrogen fertilizer gradients in rain-fed regions of the Loess Plateau, China.

3、Recommended Methods for Optimal Nitrogen Application Rate

Based on the theory of optimal N application and the present situation of N fertilizer application in China, we summarized the recommended methods for optimal N rate used in current research.

Optimal Nitrogen Fertilizer Application Frequency For Healthy Plant

Discover the ideal nitrogen fertilizer application frequency to promote robust plant growth, maximize yield, and maintain soil health effectively.

Optimizing nitrogen application frequency to enhance the post

Optimizing water/fertilizer management is therefore imperative. This study reports on a field experiment conducted in Tongliao, Inner Mongolia (2020–2021) that used ‘Dika 159’ maize grown at a density of 9.0 × 10 4 plants ha −1.

Optimal nitrogen application rate enhances the asymbiotic nitrogen

Six N application rate treatments were setup, 0 (N0), 120 (N120), 150 (N150), 180 (N180), 210 (N210), and 240 (N240) kg/hm 2.

Optimal timing and rate of nitrogen fertilizer use: An integrated

We use this framework to estimate nitrogen fertilizer application inefficiency and to determine the optimal rate and timing of fertilizer application.

Optimizing Nitrogen Fertilizer Management Enhances Rice Yield, Dry

Optimizing nitrogen fertilizer management can effectively improve soil ecology, promote agricultural production, and increase the income of farmers and workers.

Optimizing nitrogen fertilizer application under reduced irrigation

Following reduced irrigation strategies in the north China plain (NCP), nitrogen (N) fertilizer application must be optimized in terms of the food production and resource use efficiency. In this study, experiments were conducted for three consecutive winter wheat seasons in 2013–2016.

Optimizing nitrogen fertilizer use for more grain and less pollution

Optimal nitrogen (N) management is critical for efficient crop production and agricultural pollution control. Approximate 210–220 kg ha −1 N fertilizer was applied in millions of small plots through broadcasting way in China, resulting in over and loss of N fertilizers.

The use of nitrogen fertilizer is a critical aspect of agricultural production, as it provides essential nutrients for plant growth and development. excessive nitrogen application can lead to issues such as soil acidification and groundwater contamination. rational use of nitrogen fertilizer is vital for maintaining soil health and improving crop yields.

I. The Role of Nitrogen Fertilizer

Nitrogen fertilizer contains elemental nitrogen, which plants absorb and convert into compounds like ammonia (NH₃) and nitrate (NO₃⁻) to support growth. Nitrogen plays a key role in plant development by promoting cell division and elongation, increasing leaf count, and enhancing photosynthetic efficiency. Additionally, it stimulates root growth and improves the plant’s ability to absorb water and nutrients.

II. Principles of Nitrogen Fertilizer Application

1. Right Quantity: Apply nitrogen based on soil fertility and crop requirements. Excessive use disrupts soil ecological balance. Generally, nitrogen application per mu (0.067 hectares) should not exceed 20 kilograms.

2. Uniform Distribution: Spread nitrogen evenly to avoid localized over-application, ensuring balanced nutrient supply for overall plant growth.

3. Timely Application: Adjust nitrogen use according to crop growth stages. Increase dosage early to boost growth, then reduce it later to prevent excess. Adapt strategies based on crop conditions and weather.

4. Mixed Use: Combine nitrogen fertilizer with organic matter to stabilize soil pH, enhance nitrogen retention, and improve efficiency.

5. Deep Placement: Apply nitrogen at depths of 20–30 cm to reduce volatilization and increase absorption.

6. Slow-Release/Controlled-Release: Use slow- or controlled-release formulations to minimize loss, extend effectiveness, and reduce topping-up frequency.

III. Optimal Application Frequency

1. First Application: Apply base fertilizer (organic + partial chemical nitrogen) before planting to establish nutrient foundations.

2. Second Application: Top-dress during growth stages. Use higher doses early for rapid growth, then taper off to avoid excess.

3. Third Application: After harvest, return crop residues or organic matter to replenish soil nitrogen and organic content, reducing nutrient loss.

IV. Precautions

1. Avoid Monoculture: Rotate crops or switch varieties to prevent soil nutrient imbalance.

2. Ensure Drainage: Excess nitrogen can impede drainage, leading to waterlogging and disease. Maintain proper drainage systems.

3. Prevent Overapplication: Excess nitrogen causes soil acidification, pollution, and harms crops. Adhere to recommended doses.

4. Monitor Soil Health: Regularly test soil nutrients to evaluate fertilizer effects and adjust strategies for optimal crop performance.

Rational nitrogen use is essential for soil health and productivity. Follow principles of right quantity, uniformity, timing, mixing, deep placement, and slow-release/controlled-release. Tailor applications to crop cycles and soil conditions while avoiding monoculture, ensuring drainage, limiting excess use, and monitoring soil health. These practices promote sustainable agriculture and efficient nutrient utilization.