1、Optimal nitrogen management to achieve high wheat grain yield, grain

It was observed that applying 100–200 kg/ha of N was the optimal rate for maximizing yield, GPC, and WP. Medium soil texture and humid climate conditions showed a more pronounced increase in yield in response to N addition.

2、Wheat Fertilizer Requirements

In general, depending on the soil fertility (organic content of the ground), the total N amount required to be applied with fertilization varies between 20 to 120 kg per hectare (17.8 to 107 lb per acre).

3、Global needs for nitrogen fertilizer to improve wheat yield under

To achieve the full yield potential—a 52% increase in global average yield under a mid-century high warming climate scenario (RCP8.5), fertilizer use would need to increase fourfold over current...

4、What fertilizer is used for wheat base fertilizer? How much is used per

After understanding the above contents, we can know that when sowing wheat, the base fertilizer can be ternary compound fertilizer (such as nitrogen, phosphorus and potassium content of 15 respectively), or diammonium and potassium fertilizer can be used together.

5、Best Fertilizer for Wheat: Top Choices for High Yields

Dryland wheat might need 0 to 75 pounds of nitrogen per acre. This depends on soil nitrate levels and organic matter. Irrigated wheat, aiming for 100 bushels per acre, could need up to 125 pounds of nitrogen. Phosphorus and potassium needs change with soil test levels.

Wheat Nutrition and Fertilizer Requirements: Nitrogen

Generally, 70% of the fertilizer nitrogen is contained in the seed, with the remaining 30% being in the straw (Table 1).

Developing a nitrogen application estimation model for diverse wheat

To address this issue, this study proposes a cost-effective and user-friendly method to accurately predict plant nitrogen uptake for improving N management decisions. The study used a meta-analysis method, and modeling by integrating datasets from published papers.

Global evaluation of key factors influencing nitrogen fertilization

However, various factors affecting yield and N fertilizer efficiency in wheat crops on a global scale are not extensively studied, thus highlighting the need for a comprehensive meta-analysis.

When & How Much Nitrogen to Apply to Wheat

Nitrogen applied early has the potential to be lost since wheat will use little N until after jointing. Urea-ammonium nitrate (UAN) or 28% has the greatest potential for loss and ammonium sulfate the least.

Wheat Yield Response to Chemical Nitrogen Fertilizer Application in

Studies suggest that improving nitrogen use efficiency (NUE) is among the key strategies for sustainable crop production. However, yield response to chemical nitrogen fertilizer use (N use) and the NUE was not fully investigated both in China and Africa.

Determining the appropriate amount of nitrogen fertilizer for wheat base fertilization is a complex issue, as it depends on multiple factors including soil type, crop requirements, climatic conditions, and fertilization strategies. Below, I will explain in detail how to determine the nitrogen fertilizer needs for wheat planting and provide a specific calculation example.

1. Soil Test Results

Before applying fertilizer, soil testing is essential to understand its nitrogen content. This can be done using a professional soil testing kit or by contacting local agricultural extension services for on-site analysis.

• Soil Testing: Tests typically provide key data such as soil pH, organic matter content, nutrient levels (including nitrogen), and moisture content.
• Result Analysis: Based on the test results, farmers can determine whether additional nitrogen is needed and how much to apply.

2. Crop Requirements

Nitrogen demand varies at different growth stages of wheat. For example, nitrogen requirements are higher during the tillering and jointing stages but lower during maturity.

• Growth Stages: Understanding these stages helps determine when and how much nitrogen to apply.
• Yield Targets: Higher yield goals may require more nitrogen early in the growth cycle.

3. Climatic Conditions

Climate also impacts nitrogen usage. For instance, in dry conditions, increased nitrogen may be needed to promote root development.

• Climate Factors: Local rainfall, temperature range, and other weather patterns affect wheat growth rates and nitrogen demands.

4. Fertilization Strategies

Effective fertilization strategies maximize nutrient use efficiency. Common approaches include:

• Base + Topdressing: Apply a portion of nitrogen as base fertilizer before planting, with the remainder top-dressed during growth. This reduces waste from overapplication.
• Stratified Application: Distribute nitrogen proportionally across soil layers (e.g., surface and subsurface) to ensure even nutrient distribution.
• Slow-/Controlled-Release Fertilizers: These reduce application frequency while maintaining steady nutrient supply.

5. Calculating Nitrogen Requirements

Assume soil tests show low nitrogen levels, and the target yield is 1,000 kg/ha. Follow these steps:

1. Determine per-hectare needs: Wheat requires approximately 100 kg of nitrogen per 1,000 kg of grain.
2. Adjust for crop stages: Since tillering and jointing account for half of total nitrogen demand, allocate 50% of nitrogen to these stages.
3. Total requirement: Total nitrogen needed = 50 kg/ha (half of 100 kg).
4. Base vs. Topdressing: If 50% of nitrogen is applied as base fertilizer:
   • Base fertilizer: ( 50 , ext{kg/ha} div 50\% = 100 , ext{kg/ha} )
   • Topdressing: Remaining ( 50 , ext{kg/ha} ).

The optimal nitrogen rate for wheat depends on soil tests, crop demands, climate, and fertilization methods. By integrating these factors and adopting scientific strategies, farmers can ensure adequate nitrogen supply for healthy wheat growth and high yields.