1、Rational phosphorus stewardship for sustainable maize production in

The study used data from independent field experiments to quantitatively assess P fertilizer effects on maize yield in different ecological regions and determine the impact of soil properties and experimental conditions on P fertilizer application effectiveness.

2、Fertilizer Grades

If a fertilizer recommendation for corn calls for 160 lb N/a, 50 lb P2O5/a, and 50 lb K2O/a, how many pounds of the following fertilizer materials will be needed to supply the recommended amounts of nutrients on a per acre basis?

3、Plant Production and Protection Division: Fertilizer Specifications

Fertilizer grade is an expression referring to the legal guarantee of the available plant nutrients expressed as a percentage by weight in a fertilizer, e.g. a 12-32-16 grade of NPK complex fertilizer indicates the presence of 12 % nitrogen (N), 32 % phosphorous (P 2 O 5) and 16 % potash (K 2 O).

4、Effects of Different Phosphate Fertilizer Dosages and Application

To maximize the yield increasing potential of phosphate fertilizer, it is necessary to reduce the amount and increase the efficiency of fertilizer application in middle and south area of Hebei Province.

5、Fertilizers

The three-number combination on the product identifies percentages, by weight, of nitrogen (N), phosphorus in the form of phosphate (P2O5), and potassium in the form of potash (K2O) contained in the product.

Different Phosphate Application Amounts Affecting Yield and Seed Vigor

Abstract: The paper aimed at studying the effect of phosphorus fertilizer application on seed vitality, yield and yield components of wheat, and provide theoretical basis for reasonable application of phosphate fertilizer, produce high energy seed and improve wheat yield.

Fertiliser caculations

For the fertilisers you are considering, work out the rate you would have to apply to get the nutrients required (calculation A), then use calculation D to work out the cost per hectare.

Toward the sustainable use of mineral phosphorus fertilizers for crop

In this study, a meta-analysis and substance flow analysis (SFA) were employed to evaluate the effects of different mineral P fertilizer types on crop yield and P flow from rock phosphate (RP) exploitation to P use in China.

Phosphorus Fertilizers for Crop Production

Analyses of phosphorus fertilizers are typically reported as percent P2O5, a phosphate form that is not actually present in fertilizers but is used as an industry standard measure. In a standard fertilizer analysis, the second number is the percent of P2O5 by weight in the fertilizer.

Calculating Fertilizer Rates for Vegetable and Fruit Crops

To determine how much nutrient to apply based on the soil test, download and refer to the Nutrient Management for Commercial Fruit and Vegetable Crops in Minnesota. This guide has taken some of the work out of calculating nutrient needs.

Phosphate fertilizer is one of the essential nutrients in agricultural production, primarily providing plants with phosphorus nutrition. Proper dosage of phosphate fertilizer is crucial for improving crop yield and quality. Below is a detailed explanation of phosphate fertilizer weight:

I. Weight Units and Conversions for Phosphate Fertilizer

1. Jin: In traditional Chinese units, 1 jin equals 500 grams. Thus, the weight of one jin of phosphate fertilizer is 500 grams.
2. Kilogram (kg): In the metric system, 1 kilogram equals 1000 grams. one jin of phosphate fertilizer is equivalent to 0.5 kilograms (500 grams ÷ 0.5 = 1000 grams).
3. Gram (g): Under the International System of Units (SI), 1 kilogram equals 1000 grams. Hence, one jin of phosphate fertilizer weighs 500 grams.
4. Milligram (mg): In scientific measurements, 1 milligram equals 0.001 grams. one jin of phosphate fertilizer equals 500,000 milligrams (500 grams ÷ 0.001).

II. Calculation of Phosphate Fertilizer Application Rates

1. Crop Requirement Analysis: First, determine the target crop’s phosphorus needs. Different crops require varying phosphorus levels, typically expressed in ppm (parts per million). For example, corn requires 225–275 kg of diammonium phosphate per hectare, translating to 225–275 grams per mu (1 hectare = 15 mu).
2. Soil Test Results: Conduct soil tests to assess phosphorus content and availability. If soil phosphorus is low or poorly available, increase the fertilizer dosage accordingly.
3. Fertilization Methods: Adjust dosage based on application methods (e.g., basal dressing, topdressing, foliar spraying). For basal application, use 225–275 grams of diammonium phosphate per mu; for topdressing, dosage may be doubled but should not exceed recommended limits.
4. Timing: Apply phosphate fertilizer during critical growth stages, prioritizing spring when plants are actively growing.

III. Precautions for Phosphate Fertilizer Use

1. Avoid Overapplication: Excessive phosphorus can accumulate in soil, disrupt soil structure, reduce microbial activity, and cause water eutrophication. Strictly control dosage to prevent overuse.
2. Balanced Fertilization: Combine phosphate fertilizer with nitrogen, potassium, and other nutrients to ensure comprehensive plant nutrition.
3. Environmental Considerations: Protect water sources and prevent soil erosion. Minimize environmental impact by following sustainable practices.
4. Compliance with Standards: Adhere to national guidelines and industry standards to ensure safety and efficacy.

The appropriate amount of phosphate fertilizer depends on crop requirements, soil conditions, application methods, and environmental factors. Avoid overapplication, balance nutrients, and follow regulatory standards to maximize safety and effectiveness.