1、Potassium in agriculture – Status and perspectives

In this review we summarize factors determining the plant availability of soil potassium (K), the role of K in crop yield formation and product quality, and the dependence of crop stress resistance on K nutrition. Average soil reserves of K are generally large, but most of it is not plant-available.

2、The effects of potassium fertilization on water‐use efficiency in crop plants

The main objective of this conceptual review is to confirm that adequate K management can be used as an important tool to alleviate the negative effects of water deficit on plant growth, yield-component formation, and yield.

3、Effects of fertilization on crop production and nutrient

Based on the study results, a balanced nutrient application using NPK fertilization is a key management strategy for enhancing rice-rapeseed productivity and environmental safety. Agriculture...

Potassium fertilization: paradox or K management dilemma?

We believe that measurement of Exch-K is an essential and valuable tool and its use should be continued, along with improvements in recommending K fertilizer application.

Potassium fertilizer via hydrothermal alteration of K

First, the inherent solubility of potassium salts questions their efficacy in weathered soils. Second, long-distance transportation leaves unsolved the problems of limited local supplies and infrastructure, freight-related CO 2 emissions and cost of the fertilizer for the end user.

Long

Application of K fertilizer on the basis of NP fertilizers could increase the yield of wheat and maize while the grain and straw yields in each treatment were significantly higher for maize than for wheat.

Phosphorus and Potassium Fertilizer Application Strategies in Corn–Soybean Rotations

Phosphorus (P) and potassium (K) are essential nutrients for corn and soybean, comprising a significant proportion of total fertilizer expenditures, and can be yield limiting in many major crop production areas in the United States.

Fertilizer Management Strategies for Sustainable Rice Production

Potassium is the third most important nutrient element required for rice production. The amount of added K is almost equal to N fertilizer requirements, although its uptake depends on rice genotypes.

Nitrogen, phosphorus, and potassium fertilization to achieve expected yield and improve yield components of mung bean

Following three years experimentation, the optimal fertilization measures were validated in 2016–2017, the results indicated that yield increased by 19.6% than that obtained using conventional fertilization.

Application of Manures and Fertilizers

Since the fertilizers are costly, only sufficient amount which gives maximum yield should be added (which is most profitable to the farmer). The basis of fertilizer application is soil and plant tissue analysis.

The application of potassium fertilizers is an indispensable component of agricultural production, playing a critical role in improving crop yields and quality, as well as enhancing stress resistance. Effective measures for applying potassium fertilizers include the following aspects:

1. Rational Selection of Potassium Fertilizer Types Choose appropriate potassium fertilizer varieties based on the growth needs of different crops and soil conditions. Common potassium fertilizers include potassium sulfate, potassium chloride, and potassium nitrate, among which potassium sulfate and potassium chloride are widely used. When selecting fertilizers, factors such as solubility, adsorption capacity, and stability should be considered to ensure efficient absorption by crops.

2. Scientific Timing of Fertilization The timing of potassium application significantly impacts crop growth and yield. Applying potassium during the early growth stage promotes root development and enhances nutrient uptake, while applying it during fruit expansion improves fruit quality and taste. fertilization timing should align with specific crop growth stages to optimize results.

3. Rational Fertilization Methods The method of potassium application directly affects its utilization rate and crop health. Common methods include:

   • Basal application: Incorporating potassium into the soil before planting.
   • Topdressing: Applying potassium via irrigation or liquid fertilizers during the growing season.
   • Foliar spraying: Directly spraying potassium solutions onto crop leaves. The choice of method depends on soil type, crop species, and environmental conditions.

4. Optimal Fertilization Rates Excessive potassium application can lead to soil salinization and reduced fertility, while insufficient amounts may cause poor growth and yield losses. Application rates should be determined based on soil fertility, crop type, and climatic conditions to achieve balanced nutrition.

5. Soil Improvement and Conditioning Soil properties, such as nutrient content, pH, and structure, influence potassium effectiveness. Before applying potassium fertilizers, soil should be improved through practices like organic matter addition or pH adjustment to enhance nutrient availability.

6. Integrated Use with Other Fertilizers Potassium should be applied in conjunction with nitrogen, phosphorus, and other nutrients to ensure balanced fertilization. For example, combining potassium with nitrogen promotes plant growth, while pairing it with phosphorus improves phosphorus utilization and reduces environmental pollution.

7. Monitoring and Adjustment Soil and crop nutrient status should be continuously monitored through tests and observations. Fertilization plans must be adjusted based on climate, market demands, and crop responses to maintain optimal nutrient balance.

Effective potassium fertilization involves multiple strategies, including rational fertilizer selection, scientific timing, appropriate methods, optimized rates, soil improvement, integrated nutrient management, and dynamic monitoring. By addressing these factors comprehensively, potassium can be utilized efficiently to support healthy crop growth and boost agricultural productivity.