1、Impact of Subsurface Application of Compound Mineral Fertilizer on Soil

Subsurface application of fertilizer significantly increased available phosphorus content in soil under soybean and winter wheat crops; however, it significantly decreased soil pHKCl values within sites with all crops in the rotation compared to surface application.

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

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、Effect of localized fertilizer application on deep root development

Fertilizer was homogeneously mixed and broadcasted on the soil surface in two control treatments, while in three LF treatments, it was point-placed at 2.5, 7.5 and 12.5 cm below the soil surface.

4、Impact of Subsurface Application of Compound Mineral

The results of the present study have demonstrated a positive effect of subsurface application of compound mineral fertilizer on the soil biochemical parameters in reduced tillage. This may be a recommendation for the subsurface use of multicomponent mineral fertilizers in sustainable agriculture.

Soil Management

Since soil amendments are applied to the surface of the soil and not incorporated, they tend to build up in the surface layer. While acidification from organic residues may occur, lime may correct this problem.

Chapter 5

rporation Broadcasting spreads fertilizer across the soi. surface. Broadcast fertilizer can be left on the soil surface or incorporated by a tillage operation after ap. lication. With incorporation, these nutrients are mixed into the surface layer of the soil where root interception is more likely.

Impact of Subsurface Application of Compound Mineral Fertilizer on Soil

Therefore, the way mineral fertilizer is applied has a direct impact on the availability of essential nutrients in the soil. The commonly used surface spreading of mineral fertilizers does not ensure optimal uptake of nutrients by plant roots.

Certified Crop Advisor study resources (Northeast region)

Surface broadcast is a method by which fertilizer is applied on the surface across an entire field. High capacity fertilizer spreaders are often used which spin dry fertilizer or spray liquid fertilizer on the soil surface or on a growing crop.

The Effect of Subsurface Placement of Mineral Fertilizer on Some Soil

The aim of this research was to evaluate the effect of the subsurface application of different rates of a compound mineral fertilizer on the content of some macronutrients, soil organic...

Type of the Paper (Article

The method of application and rate of mineral fertilizer did not have a significant effect on the organic carbon and total nitrogen content in the soil of the plots with all rotational crops.

Compound fertilizer is a commonly used agricultural product that contains essential nutrients for plant growth, such as nitrogen (N), phosphorus (P), and potassium (K). In agricultural practices, various methods are employed to apply compound fertilizer, including directly sprinkling it onto the soil surface. Whether this approach is feasible, along with its advantages and precautions, is a concern for many farmers. Below are suggestions on whether compound fertilizer can be placed on soil surfaces and how to use it correctly:

I. Can Compound Fertilizer Be Placed on Soil Surfaces?

1. Theoretical Feasibility

• Chemical Stability: Compound fertilizer typically comes in solid granular form with stable chemical properties. It does not readily react with soil moisture or pH levels. theoretically, placing it on the soil surface does not cause nutrient loss or decomposition due to physical interactions.
• Convenient Application: Sprinkling compound fertilizer directly onto the soil surface allows precise control over dosage and depth, reducing waste from improper application. This method also minimizes damage to crop roots during fertilization.
• Reduced Environmental Pollution: Surface application lowers the risk of fertilizer runoff into groundwater during rain, thereby reducing environmental impact.

2. Practical Considerations

• Soil Conditions: Soil type and condition determine suitability for surface application. For example, sandy soils (with high drainage) are suitable for surface sprinkling, while clay soils (with strong water retention) may not be ideal.
• Crop Requirements: Different crops have varying nutrient needs. Adjust fertilization amounts and methods based on growth stages. For instance, leafy crops may require more nitrogen, while root vegetables benefit from higher phosphorus.
• Fertilization Tools: Use specialized equipment (e.g., fertilizer spreaders, drones) to improve efficiency. These tools ensure accurate dosing and placement, preventing over- or under-application.

II. How to Use Compound Fertilizer Correctly

1. Selecting the Right Compound Fertilizer

• Understand Crop Needs: Choose fertilizer based on crop growth stages. For long-growing crops, opt for high-nitrogen formulas; for short-season crops, prioritize phosphorus-rich options.
• Consider Soil Type: Tailor fertilizer to soil conditions. For sandy soils, use low-nitrogen blends; for clay soils, select high-phosphorus varieties.
• Choose Reputable Brands: Prioritize well-known brands to ensure quality and safety. Refer to user reviews and recommendations for reliable products.

2. Rational Application of Compound Fertilizer

• Follow Fertilization Principles: Apply fertilizer in "small amounts, multiple times" to avoid nutrient excess or waste.
• Uniform Distribution: After sprinkling, ensure even dispersal using manual or mechanical methods to cover all areas adequately.
• Timing Matters: Apply on dry, sunny days to prevent rain-induced runoff and reduce root damage.

3. Post-Application Management

• Monitor Crop Growth: Observe plants closely after fertilization. Address issues like stunted growth or abnormalities by adjusting fertilization strategies.
• Timely Topdressing: Supplement with additional nutrients during critical growth stages to meet evolving crop demands.

Compound fertilizer can be placed on soil surfaces, but its use should be adjusted based on soil type, crop needs, and application tools. To maximize effectiveness, follow principles like uniform distribution, timely application, and post-management. Closely monitor crop responses and address challenges promptly.