Low potassium availability in soil

The gap

Evidence profile

Sourced from the abstract and stated research gap and stated challenges and future-work section of the source papers, classified as general, spanning 4 journals.

Supporting evidence — 8 representative gaps

• Controlled-release potassium sulfate combined with the deep banding method on soybean productivity and soil microbial characteristics (2026) · Frontiers in Plant Science · doi

  Controlled-release potassium sulfate (CPS) and deep banding fertilization are promising strategies for improving crop productivity, but their combined effects on soybean growth remain unclear.

  generalabstractevidence 5/5
  Keywords: controlled release potassium sulfate deep banding fertilization promising strategies improving crop productivity combined effects soybean
• Controlled-release potassium sulfate combined with the deep banding method on soybean productivity and soil microbial characteristics (2026) · Frontiers in Plant Science · doi

  The study identifies a gap in the understanding of the combined effects of controlled-release potassium sulfate and deep banding fertilization on soybean growth and soil microbial characteristics. There is a need for more research on optimized fertilization practices for soybean production in China.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap understanding combined effects controlled-release potassium
• Revealing the mechanisms behind high potassium efficiency in vegetable soybean through rhizospheric microbial community recruitment and potassium activation (2026) · Soil Ecology Letters · doi

  The synergistic mechanisms by which potassium high-efficiency vegetable soybeans coordinate root exudation and microbial recruitment to enhance potassium absorption under low-K stress remain unclear.

  generalstated research gapevidence 5/5
  Keywords: synergistic mechanisms potassium high-efficiency vegetable soybeans coordinate root
• Optimizing Potassium Fertilization for Precision Nutrition: Effects on Growth, Physiology, and Seed Potassium Content of Two Soybean Varieties (2026) · Journal of Tropical Crop Science · doi

  The study identifies a gap in the understanding of the effects of potassium fertilization on soybean productivity. The research highlights the need for further studies on the optimal potassium dose for improving soybean yield performance.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap understanding effects potassium fertilization soybean
• Controlled-release potassium sulfate combined with the deep banding method on soybean productivity and soil microbial characteristics (2026) · Frontiers in Plant Science · doi

  Intensive agricultural production often relies on excessive potassium fertilization, causing soil potassium fixation and nutrient accumulation. Long-term irrational potassium input triggers soil secondary salinization, disrupts soil nutrient balance, and deteriorates soil quality. Optimized fertilization practices are needed to improve soybean production capacity and reduce environmental impacts.

  generalstated challengesevidence 5/5
  Keywords: intensive agricultural production often relies excessive potassium fertilization
• Pyrolysis temperature regulates biochar-soil interactions to enhance cation exchange capacity, plant growth, and photosynthetic performance (2026) · BMC Plant Biology · doi

  Enhancing the soil capacity to retain cations such as Ca²⁺, Mg²⁺, and K⁺ is critical for sustaining plant nutrition, yet strategies that simultaneously improve cation availability and crop performance remain underexplored.

  generalabstractevidence 4/5
  Keywords: enhancing soil capacity retain cations critical sustaining plant nutrition strategies simultaneously improve cation availability crop
• Controlled-release potassium sulfate combined with the deep banding method on soybean productivity and soil microbial characteristics (2026) · Frontiers in Plant Science · doi

  Further studies are needed to investigate the long-term effects of deep banding and controlled-release potassium sulfate application on soybean production. Research should focus on optimizing fertilization practices for different soil types and climatic conditions. The development of more efficient and sustainable fertilization strategies for soybean production is an area for future research.

  generalfuture-work sectionevidence 4/5
  Keywords: further studies needed investigate long-term effects deep banding
• Revealing the mechanisms behind high potassium efficiency in vegetable soybean through rhizospheric microbial community recruitment and potassium activation (2026) · Soil Ecology Letters · doi

  Low potassium availability in soil. Limited understanding of the mechanisms underlying potassium efficiency in vegetable soybean.

  generalstated challengesevidence 4/5
  Keywords: low potassium availability soil limited understanding mechanisms underlying

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