Correct application method and precautions of 15-15-15 fertilizer of nitrogen, phosphorus and potassium

NPK 15-15-15 fertilizer is a balanced compound fertilizer widely used in the cultivation of various crops. Proper application of this type of fertilizer can not only increase crop yields, but also improve crop quality. This article will introduce in detail the correct application method and precautions of NPK 15-15-15 fertilizer to help farmers maximize the effect of fertilizer use.

Understanding Crop Needs

The first step in fertilization is to understand the fertilizer requirements of crops. Different crops have different requirements and proportions for nitrogen, phosphorus and potassium. Fertilization should be done reasonably according to the fertilizer requirements of specific crops to ensure balanced nutrition. For example, cereal crops have a higher demand for nitrogen, while root crops have a higher demand for potassium. Therefore, the fertilization ratio should be adjusted according to the growth stage of the crop.

Timing of application

The timing of fertilization has an important impact on the efficiency of fertilizer utilization. Generally speaking, the best effect of NPK 15-15-15 fertilizer is applied at the following key stages:

• Before planting: Applying during land preparation can provide crops with the nutrients they need in the early stages of growth.
• Medium term: Apply top dressing during the peak growth period of crops to ensure a continuous supply of nutrients.
• Late stage: Supplementing fertilizer in the later stage of crop growth can help improve crop quality.

Application method

There are many ways to apply NPK 15-15-15 fertilizer, mainly including the following:

• Broadcasting: Spread the fertilizer evenly on the soil surface, then shallowly till and mix it. This method is suitable for large-scale crop planting.
• Row application: Furrows are dug between crop rows, fertilizer is applied into the furrows, and then covered with soil. This method helps to concentrate fertilizer supply and improve fertilizer efficiency.
• Hole fertilization: Fertilize directly in the planting hole and then cover with soil. Suitable for crops planted at intervals, such as fruit trees, vegetables, etc.

Precautions

When applying NPK 15-15-15 fertilizer, pay attention to the following:

• Avoid over-fertilization: Over-fertilization may cause fertilizer damage, affect crop growth, and even pollute the environment. When applying fertilizer, the amount of fertilizer should be reasonably adjusted according to the soil fertility and the fertilizer requirement of the crop.
• Combined with soil texture: Different soil types have different abilities to absorb and retain fertilizers. For example, sandy soil has low fertility, so you should increase the frequency of fertilization; while clay soil has high fertility but poor drainage, so you should pay attention to the amount of fertilizer you apply.
• Consider weather conditions: Fertilization effectiveness will be affected during rainy or dry seasons. Rainy seasons may cause fertilizer loss, while dry seasons affect fertilizer dissolution and plant absorption.

Reasonable use of nitrogen, phosphorus and potassium 15-15-15 fertilizer can not only improve crop yield and quality, but also effectively protect the environment and promote the sustainable development of agriculture.