The effects of potassium fertilization on soybean productivity

The gap

Evidence profile

Sourced from the future work and stated research gap and future-work section of the source papers, classified as general, drawn from work published between 2024 and 2026, spanning 4 journals. Those papers have been cited 15 times in total.

Supporting evidence — 4 representative gaps

• Industrial Hemp Finola Variety Photosynthetic, Morphometric, Biomechanical, and Yield Responses to K Fertilization Across Different Growth Stages (2025) · Agronomy · cited 8× · doi

  Fertilization is a necessary agricultural practice that makes cultivating the desired crop more successful. This study aimed to analyze the influence of different K fertilizer formula- tions on the photosynthetic activity of industrial hemp leaves and stem morphology and biomechanics. Even though the forms of K fertilization that were used had no significant effect on the differences between the morphological parameters or stem and seed yield, further trials should be conducted on the application of macronutrients to Finola varieties. Although the tensile strength and module elasticity were not homogeneous, these results are valuable for the harvesting and further processing of the stems. These findings are very valuable considering the differences in cost between KCl (which is a little cheaper) and potassium fertilizers containing sulfate, like K2SO4, which can certainly play a major role in agricultural decision-making. By using KCl as a fertilizer, farmers can reduce the costs of cultivation significantly, especially for crops that are not sensitive to chloride. In the present study, the industrial hemp variety Finola did not show any extreme influence regard the KCl application; thus, it can be recommended for future use in industrial hemp production. In general, the applied KCl doses showed lower values than the control and K2SO4 for half of the chlorophyll a fluorescence parameters in the industrial hemp leaves. On the other hand, the values of the ChlF parameters measured at the maturity stage were mostly lower than those measured at the flowering stage. Although there were some changes in the efficiency of the photosystems I and II, our next step is to investigate the effect of higher doses of K fertilizers to gain insight into the photosynthetic activity at a higher level of availability of K from the soil to the cannabis plants. Author Contributions: Conceptualization, I.K., I.V. and A.M.K.; methodology, A.M.K., D.I., M.T. and P.K.; software, A.M.K., P.K. and I.V.; formal analysis, A.M.K., P.K., M.T. and I.V.; investigation, I.K., A.M.K. and I.V.; writing—original draft preparation, I.V., A.M.K., P.K. and M.T.; writing—review and editing, D.I. and I.K.; visualization, A.M.K.; project administration, I.K. All authors have read and agreed to the published version of the manuscript. Funding: This research was a part of the project Rammed Earth for modeling and standardization in seismically active areas (RE–forMS project, UIP-2020-02-7363), founded by the Croatian Science Foundation (HRZZ). Institutional Review Board Statement: Not applicable. Data Availability Statement: The data presented in this study are available on request from the corresponding author. Conflicts of Interest: The authors declare no conflicts of interest. Agronomy 2025, 15, 496

  generalfuture work
  Keywords: industrial hemp parameters project fertilization agricultural influence fertilizer photosynthetic activity leaves stem forms effect differences
• 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
• The Source of K Fertilizer for Industrial Hemp (Cannabis sativa L.): Mechanical and Chemical Properties of Stem for Rammed Earth Walls (2024) · Agriculture · cited 7× · doi

  Investigate the effect of different K fertilizer sources on industrial hemp stem properties, - Examine the potential applications of industrial hemp fibers in various construction materials, - Study the impact of K fertilization on other plant parameters such as seed yield and quality

  generalfuture-work sectionevidence 5/5
  Keywords: investigate effect different fertilizer sources industrial hemp stem

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