1、Tillage and Fertility Placement Aspects of Root Zone Optimization for Corn

We tentatively conclude that RTK guidance is advantageous when planting corn soon after banded UAN application, and that the optimum corn row position for a “safe” response shortly after UAN application at high rates is about 5 inches from, and parallel to, the UAN band.

2、Fertilizer placement to improve crop nutrient acquisition and yield: A review and meta

In this paper, “fertilizer placement” refers to localized application of fertilizers to small areas on surface or subsurface soil. Early studies on fertilizer placement mainly focused on the effects on crop yields.

3、Phosphorus and Potassium Fertilizer Application Strategies in Corn–Soybean Rotations

Phosphorus (P) and potassium (K) are essential nutrients for corn and soybean, comprising a significant proportion of total fertilizer expenditures, and can be yield limiting in many major crop production areas in the United States.

4、Localized Application of Fertilizers in Vegetable Crop Production

Localized applications of fertilizers are alternatives to broadcast applications across the entire field surface for economic, environmental and technological reasons.

Impact of Tillage and Fertilizer Application Method on Gas Emissions in a Corn Cropping System

Fertilizer sources were urea-ammonium nitrate (UAN), ammonium nitrate (AN) and poultry litter (M) applied at a rate of 170 kg ha −1 of available N. Banding of fertilizer resulted in the greatest concentration of gaseous loss (CO 2 and N 2 O) compared to surface applications of fertilizer.

Nitrogen use efficiency in a wheat–corn cropping system from 15 years of manure and fertilizer applications

To develop strategies for efficient nutrient management, we investigated the effects of long-term (1991–2005) various fertilization regimes on yield, NUE and N agronomic efficiency (NAE) in a wheat–corn cropping system at four sites (Changping, Zhengzhou, Yangling, and Qiyang) in China.

Band vs. Broadcast Application of Fertilizer

A broadcast application of fertilizer to the soil surface for no-till corn is in reality a horizontal band application. Data from other states have shown the same for no-till soybeans. Summary: Banding fertilizer decreases the surface area of fertilizer exposed to soil.

Fertigation: A midseason option for fertilizer application to irrigated fields

Applying fertilizer through irrigation, also known as fertigation, allows irrigators to apply the last increment of nitrogen to their growing crops.

Corn special fertilizer under corn peanut intercropping condition and preparation method thereof

Test plan: apply the new special fertilizer for fertilizing corn of the present invention during one growth period of corn, the application rate is 40 kg / mu, and apply it at one time when sowing.

Split Application of Urea Does Not Decrease and May Increase Nitrous Oxide Emissions in Rainfed Corn

fertilizer application timing efects may be influ-enced by the N rate as well as the crop rotation. No studies to date have evaluated N appl.

Applying fertilizer to corn in a single application requires determining the type, quantity, and timing of fertilizer based on the growth stages of corn and soil conditions. Below are detailed steps and recommendations:

1. Determine Fertilization Objectives:

• Early Growth Stage (1–2 weeks after sowing): The main goal is to promote root development and improve stress resistance. Use nitrogen fertilizers such as urea or ammonium sulfate to accelerate seedling growth.
• Growth Stage (3–6 months after sowing): During this rapid growth phase, corn requires substantial nutrients like nitrogen (N), phosphorus (P), and potassium (K). Opt for compound fertilizers like diammonium phosphate or potassium nitrate to meet nutritional demands.
• Maturity Stage (7–8 months after sowing): At this stage, corn needs abundant nutrients to support ear development and grain formation. Prioritize phosphorus fertilizers like superphosphate to enhance photosynthesis and grain plumpness.

2. Select Appropriate Fertilizers:

• Urea: Suitable for the rapid growth phase to promote plant development.
• Ammonium Sulfate: Ideal for early growth to aid root development and stress resistance.
• Diammonium Phosphate: Beneficial throughout the growth cycle, especially during growth and maturity stages, to provide phosphorus and support photosynthesis.
• Potassium Nitrate: Useful across the entire growth cycle, particularly during the growth stage, to supply potassium and improve disease resistance.
• Superphosphate: Applied during maturity to promote ear formation and grain quality.
• Organic Fertilizers: Such as chicken manure or cow dung, which enrich soil nutrients and improve structure. Avoid overuse to prevent growth issues.

3. Fertilization Methods:

• Ditch Application: Spread fertilizer evenly between corn rows or around roots. Suitable for large fields and mechanized operations.
• Hole Application: Dig small holes near roots, add fertilizer, and cover with soil. Ideal for small plots and manual labor.
• Foliar Spraying: Dilute fertilizer and spray onto leaves using a sprayer. Effective for pest/disease control and improving crop quality.

4. Fertilizer Quantity and Timing:

• Dosage: Base quantities on soil tests and corn variety. Generally, apply 50–100 kg/mu of compound fertilizer and 200–500 kg/mu of organic fertilizer.
• Timing: Align with growth stages. Apply base fertilizer 10–15 days after sowing for early growth. During the growth stage, topdress every 7–10 days. In maturity, combine foliar spraying with irrigation.

5. Precautions:

• Soil Testing: Conduct soil analysis pre-fertilization to assess nutrient content and pH for optimal fertilizer selection.
• Avoid Overapplication: Excessive fertilizer can cause soil salinization or nutrient loss.
• "Small Doses, Frequent Applications": Prevent root burning from overloading.
• Integrated Practices: Combine with crop rotation, deep tillage, and other measures to boost fertilizer efficiency and soil health.

A comprehensive one-time fertilization approach for corn requires balancing growth stages, soil conditions, and fertilization goals. By adopting scientific methods and proper dosages, this strategy effectively enhances corn growth and yield.