NPK25-15-10 Mixed Fertilizer for Corn Long Lasting Fertilizer Effect

• Basic Definition

·N (nitrogen) : 25%, mainly promoting the growth of plant stems and leaves, increasing chlorophyll content, making the plants lush and the leaves dark green. 

·P (Phosphorus) : 15%, mainly promoting root development, flower bud differentiation, flowering and fruiting, and enhancing the plant's stress resistance (cold and drought resistance). 

·K (potassium) : 10%, mainly promoting fruit enlargement, sugar synthesis, bright color, and enhancing stem strength, as well as improving resistance to lodging and diseases.

·25-15-10: This indicates that the total nutrient content in the fertilizer is 50% (25+15+10), and it belongs to high-concentration compound fertilizer. The remaining part consists of fillers and trace and medium elements.

· Blended fertilizer: Also known as BB fertilizer, it is made by simply mechanically mixing three single or compound fertilizers of nitrogen, phosphorus and potassium as the basic raw materials through physical methods. Its feature is that the formula is flexible and can be adjusted immediately according to the needs of the soil and crops.

• Main Features

· Balanced formula, focusing on vegetative growth and fruit quality: The notable feature of this formula is that it has the highest nitrogen content, followed by phosphorus and potassium. It not only ensures vigorous vegetative growth (luxuriant branches and leaves) in the early and middle stages of the crop, but also takes into account flowering, fruiting and fruit quality in the middle and later stages. It is a formula for general or fruit-oriented economic crops that promotes growth and retains fruit.

· High concentration utilization rate: The total nutrients reach 50%, with high effective components. The usage per unit area is relatively small, and the transportation and application costs are low.

· Good physical mixing flexibility: As a blended fertilizer, its particles are usually a mixture of single-component fertilizer particles with different nutrients, and the appearance may be uneven in color. The advantage is that the ratio of N, P and K can be quickly customized based on the soil test results and the specific needs of the crops.

·The combination of quick-acting and long-lasting effects: Depending on the source of the raw materials (such as whether urea or controlled-release nitrogen is used for nitrogen fertilizer, and whether potassium chloride or potassium sulfate is used for potassium fertilizer), the effect period of the fertilizer can be adjusted.

Packaging

Granular

Packaging

• Applicable crops and periods
  

· Fruit trees: The effect is remarkable when used from flowering to fruit expansion. At this time, fruit trees need nitrogen not only to maintain the growth of new shoots and leaves and provide photosynthetic products for the fruits, but also phosphorus and potassium to promote fruit enlargement and sweetening. Such as citrus fruits, apples, grapes, mangoes, jujube trees, etc.

· Vegetables: Especially fruit vegetables (such as tomatoes, peppers, eggplants, cucumbers, etc.) during the early stage of fruit setting and the period of fruit expansion. While ensuring that the plants do not age prematurely, it promotes fruit development.

· Field cash crops such as cotton, tobacco, and sugarcane are in their vigorous growth period.

· Ornamental plants: Suitable for flowering and fruit-bearing plants, promoting the growth of plants and the flourishing of flowers.

Situations of inapplicability or caution:

· Seedling stage: At this time, high phosphorus is needed to promote root growth. However, the phosphorus ratio in this formula is relatively insufficient. 

· Pre-flowering stage: At this time, nitrogen should be controlled to promote flowering. High nitrogen may cause excessive growth and flower drop.

·In the later growth stage of root and tuber crops (such as potatoes and sweet potatoes), the demand for potassium is extremely high (commonly used high-potassium fertilizers like 15-15-30), but the potassium content in this formula is insufficient.

·Chlorine-sensitive crops: If potassium chloride is used in the raw materials, chlorine-sensitive crops such as tobacco, potatoes, and citrus fruits should be used with caution. A potassium sulfate-based formula should be selected instead.

Corn

Corn

Corn

• Application methods and suggestions
  

· Base fertilizer: Before sowing or transplanting, apply it deeply in combination with land preparation and cover the soil to prevent nitrogen volatilization. 

· Topdressing: The most commonly used method is to apply fertilizer by digging furrows or holes during the critical growth period of crops (such as the fruit expansion period of trees and the peak fruiting period of vegetables), and then cover the soil and water.

Used in combination:

·To enhance fertilizer efficiency, it is recommended to use it in combination with organic fertilizers (farmyard manure, commercial organic fertilizers) to improve soil quality and increase fertilizer utilization rate. According to the needs of crops, trace element fertilizers (such as calcium, boron, zinc, etc.) can be supplemented, especially on fruit trees and vegetables.

• Precautions

·Avoid mixing with alkaline substances such as wood ash and lime to prevent nitrogen volatilization and loss. Cover the soil and water promptly after application, especially nitrogen fertilizers, to reduce ammonia volatilization and loss and promote dissolution and absorption. Check the chloride ion content: The packaging should be marked with "Chlorine (low chlorine, medium chlorine, high chlorine)" or "sulfur Group". For chlorine-sensitive crops, it is essential to choose sulfur-based (potassium sulfate type) products. Storage of blended fertilizers: The densities and particle sizes of each component may vary. Long-term storage can easily lead to stratification, resulting in uneven nutrient distribution. Stir slightly before application.

• Summary

NPK25-15-10 blended fertilizer is a balanced formula fertilizer with high nitrogen, phosphorus and potassium content. It is particularly suitable for use as top dressing during the critical period when vegetative growth and reproductive growth occur simultaneously (such as the fruit expansion period of trees and the peak fruiting period of vegetables), in order to achieve the effect of "promoting seedling growth, protecting fruits, improving quality and increasing yield". When in use, it is essential to combine soil conditions, the nutrient requirements of crops, and adopt scientific application methods to achieve the best benefits.

FAQ