On the long-term effects of graded nitrogen, phosphorus

The gap

Evidence profile

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

Supporting evidence — 5 representative gaps

• Delayed sowing limits grain number per spike in wheat by restricting young spike differentiation through reduced photothermal resources (2026) · Frontiers in Plant Science · doi

  Further studies should investigate the effects of delayed sowing on other wheat cultivars. Research should focus on developing breeding programs for wheat cultivars with improved tolerance to delayed sowing. The study's findings should be validated in different environmental conditions.

  generalfuture-work sectionevidence 5/5
  Keywords: further studies investigate effects delayed sowing other wheat
• Optimising wheat productivity through graded nitrogen, phosphorus and potassium fertilisation and rice-straw biochar-farmyard manure integration in the rice-wheat system of Punjab (2026) · Plant Science Today · doi

  Further studies on the long-term effects of graded nitrogen, phosphorus, and potassium fertilisation on wheat productivity. Investigations on the potential of other organic amendments to improve wheat growth and yield.

  generalfuture-work sectionevidence 5/5
  Keywords: further studies long-term effects graded nitrogen phosphorus potassium
• Analysis of the Effects of Nitrogen Fertilizer on Wheat Yield and Quality Under Late-Sowing Conditions (2026) · Agriculture · doi

  The optimal nitrogen rate and basal-topdressing ratio for late-sown high-quality wheat remain undefined. There is a lack of understanding of the regulatory effects of nitrogen fertilizer application regimes on the yield and quality of late-sown wheat.

  generalstated research gapevidence 5/5
  Keywords: optimal nitrogen rate basal-topdressing ratio late-sown high-quality wheat
• Early Planting and Optimized Nitrogen Rate Maximize Biomass Sorghum Yield and Profitability (2026) · Food and Energy Security · doi

  ABSTRACT Nitrogen (N) rate, timing, and source can strongly influence biomass sorghum yield, profitability, and disease risk, yet these management effects remain insufficiently understood under early‐ and late‐planted systems in the Mid‐Atlantic U.

  generalabstractevidence 4/5
  Keywords: abstract nitrogen rate timing source strongly influence biomass sorghum yield profitability disease risk management effects
• Analysis of the Effects of Nitrogen Fertilizer on Wheat Yield and Quality Under Late-Sowing Conditions (2026) · Agriculture · doi

  Further research is needed to investigate the effects of different nitrogen application rates and basal-topdressing ratios on late-sown wheat. Studies should be conducted to evaluate the long-term effects of optimized nitrogen management on wheat yield and quality. Research is needed to develop more effective agronomic strategies for late-sown wheat. Investigations should be made into the effects of other factors, such as planting density and crop variety, on late-sown wheat.

  generalfuture-work sectionevidence 4/5
  Keywords: further research needed investigate effects different nitrogen application

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