1、Estimating thresholds of nitrogen, phosphorus and potassium fertilizer

In this study, we proposed a method that utilizes allowed ranges of partial nutrient balance and yield to estimate the threshold of nitrogen (N), phosphorus (P), and potassium (K) fertilizer applied to rice (Oryza sativa L.) fields in China.

2、Nitrogen, phosphorus, and potassium fertilization affects the flowering

Five gradients of nitrogen (N), phosphorus (P) and potassium (K) fertilizer were set respectively to study the effects of nutrients on rice flowering time and flowering duration.

3、NPKGRIDS: a global georeferenced dataset of N, P2O5, and K2O fertilizer

We introduce NPKGRIDS, a new geospatial dataset, providing for the first time data on application rates for all three main plant nutrients, nitrogen (N), phosphorus (P, in terms of phosphorus...

4、Nitrogen, Phosphorus, and Potassium Flows through the Manure Management

Herein, we present a detailed analysis of the nutrient flows and losses in the “feed intake–excretion–housing–storage–treatment–application” manure chain, while considering differences among livestock production systems.

Appropriate Amounts of Fertilizer and Phosphate for 9 Mu of Land

For most crops, approximately 50–100 kg of nitrogen fertilizer, 10–20 kg of phosphate fertilizer, and 10–20 kg of potassium fertilizer per mu are required. these values vary depending on specific crop demands.

Understanding the Big Three: Nitrogen, Phosphorus, and Potassium

Achieving the right balance of these nutrients is essential for optimizing plant growth. The ideal NPK ratio varies with the crop and growth stage. For instance, nitrogen is crucial during vegetative growth, while phosphorus is essential during flowering and fruiting.

Nitrogen, Phosphorus, and Potassium (NPK) Fertilizer Guide

Fertilizer labels have three numbers separated by hyphens, commonly called the NPK formula. For example, 10-5-15. The numbers represent nitrogen (N), phosphorus (P), and potassium (K), respectively. So the example above would contain 10% nitrogen, 5% phosphorus, and 15% potassium per bag.

Influence of Different Nitrogen, Phosphorus, and Potassium Fertilizer

This study investigated the effects of nitrogen (N), phosphorus (P), and potassium (K) fertilizer combinations on foxtail millet agronomic traits, photosynthetic characteristics, yield, and quality to promote rational fertilizer application.

Nitrogen, phosphorus and potassium fertilizers application amounts of

In this study, the N application rate of optimal practice treatment was set at 216 kg ha −1 according to the results of the soil testing and target yield (Table 1).

Impacts of nitrogen (N), phosphorus (P), and potassium (K) fertilizers

Soil nutrient deficiency is one of the significant challenges in grain production, particularly nitrogen (N), phosphorus (P), and potassium (K). These deficiencies not only reduce crop yields but also cause associated environmental issues, such as soil structure deterioration and ecosystem services diminution.

The required amounts of nitrogen (N), phosphorus (P), and potassium (K) fertilizers for one mu of land (approximately 667 square meters) vary depending on crop type, growth stage, soil conditions, and other factors. Below are some guidelines to help determine suitable fertilization rates:

1. Nitrogen Fertilizer

Nitrogen is a key nutrient for plant growth, essential for leaf development. Fertilization rates should be adjusted based on crop requirements and soil fertility. Generally, 20–30 kilograms of urea or ammonium sulfate per mu can meet the needs of most crops. in special cases—such as nitrogen-deficient soils or vigorous crop growth—higher rates may be appropriate.

2. Phosphorus Fertilizer

Phosphorus supports root development and disease resistance. Application rates depend on crop demands and soil conditions. Typically, 10–20 kilograms of superphosphate or diammonium phosphate per mu are sufficient for most crops. Higher rates may be needed for phosphorus-deficient soils or during rapid growth phases.

3. Potassium Fertilizer

Potassium regulates water balance and stress resistance in plants. Fertilization should align with crop needs and soil properties. Generally, 5–10 kilograms of potassium nitrate or potassium sulfate per mu works for most crops. Adjustments may be necessary for potassium-poor soils or intensive growth stages.

Additional Considerations

• Balanced Formulations: Adjust the N:P:K ratio based on crop needs. A typical ratio is 1:1:1 for nitrogen to phosphorus to potassium, ensuring comprehensive nutrient supply.
• Deep Placement and Soil Coverage: Apply fertilizers deeply into the soil and cover with soil to reduce loss from wind or rain.
• Avoid Over-Fertilization: Excess nutrients can harm crops. Follow crop-specific and soil-specific recommendations.
• Soil pH Management: Choose fertilizers based on soil acidity. For example, acidic soils benefit from lime or sulfur, while alkaline soils may require sulfur or phosphate-based fertilizers.

Fertilization requirements per mu vary significantly based on crop type, growth stage, and soil conditions. Prioritize moderate application, tailor nutrient ratios, optimize fertilizer placement, and account for soil pH to maximize crop health and yield.