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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, drawn from work published between 2022 and 2026, spanning 6 journals. Those papers have been cited 10 times in total.

Supporting evidence — 8 representative gaps

• Enhancing the yield, quality, and potassium use efficiency of direct-seeded hybrid indica rice through wheat-straw returning combined with potassium fertilizer application (2026) · Frontiers in Plant Science · doi

  However, in rice–wheat rotation systems, the synergistic effects of wheat-straw returning and optimized K fertilization on yield, rice quality, and KUE of direct-seeded rice remain poorly understood.

  generalabstractevidence 5/5
  Keywords: rice wheat rotation systems synergistic effects straw returning optimized fertilization yield quality direct seeded remain
• Soil Fertility Dominates the Optimal Allocation of Basal and Tillering Nitrogen in Rice Production (2026) · Agronomy · doi

  Excessive basal and tillering nitrogen (BTN) application in rice production causes substantial N losses and environmental costs, yet practical soil fertility thresholds to guide safe BTN reduction (RBTN) have not been established.

  generalabstractevidence 5/5
  Keywords: excessive basal tillering nitrogen application rice production causes substantial losses environmental costs practical soil fertility
• Effects of a one‐time application of controlled‐release nitrogen fertilizer on quality and yield of rice (2022) · Food and Energy Security · cited 10× · doi

  Abstract Limited information is available on the influence of a one‐time application of controlled‐release nitrogen fertilizer (CRNF) in improving both yield and quality of rice.

  generalabstractevidence 5/5
  Keywords: abstract limited information available influence time application controlled release nitrogen fertilizer crnf improving yield quality
• Response of Wheat Crop to Sulphate and Muriate form of Potassium Fertilizer Under Field Condition of Lasbela, Balochistan (2026) · Journal of Agriculture and Biology · doi

  There is a need to evaluate the effect of different potassium fertilizer sources and doses on wheat performance. There is a lack of information on the comparative performance of sulphate and muriate forms of potassium on wheat growth performance, yield attributes, and soil nutrient status.

  generalstated research gapevidence 5/5
  Keywords: there need evaluate effect different potassium fertilizer sources
• 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
• Nitrogen application timing drives stage-specific rhizosphere ecological clusters that regulate the yield-quality trade-off in hybrid rice (2026) · Biology and Fertility of Soils · doi

  The effects of nitrogen-splitting regimes on rice yield and grain quality are not well understood. The relationships between nitrogen application timing, rhizosphere ecological clusters, and yield-quality trade-offs are not well understood.

  generalstated research gapevidence 5/5
  Keywords: effects nitrogen-splitting regimes rice yield grain quality well
• Nitrogen application timing drives stage-specific rhizosphere ecological clusters that regulate the yield-quality trade-off in hybrid rice (2026) · Biology and Fertility of Soils · doi

  Further research is needed to understand the mechanisms underlying the effects of nitrogen-splitting regimes on rice yield and grain quality. Further research is needed to develop more efficient and sustainable nitrogen fertilization strategies in intensive rice production systems.

  generalfuture-work sectionevidence 3/5
  Keywords: further research needed understand mechanisms underlying effects nitrogen-splitting

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