The effects of side deep application of slow-release N

The gap

Evidence profile

Sourced from the abstract and stated research gap and limitations section and future-work section of the source papers, classified as general, drawn from work published between 2024 and 2026, spanning 2 journals. Those papers have been cited 33 times in total.

Supporting evidence — 6 representative gaps

• Side deep placement of slow-release N as base fertilizer combined with urea as panicle fertilizer increases rice yield by optimizing dry matter and N accumulation and translocation (2025) · Frontiers in Plant Science · cited 13× · doi

  However, the effects of side deep application of slow-release N as base fertilizer, combined with the application of urea at different growth stages, on dry matter accumulation, N uptake, translocation, assimilation, and yield formation in rice remain unclear.

  generalabstract
  Keywords: application effects side deep slow release base fertilizer combined urea different growth stages matter accumulation
• Optimization of controlled-release fertilizer and urea ratio to increase maize yield by improving dry matter accumulation and translocation in black soil (2026) · Frontiers in Plant Science · doi

  The study identifies a gap in the understanding of the effects of different CRF:urea ratios on dry matter accumulation and translocation. The gap is related to the optimization of nitrogen management in maize production. The study aims to address this gap by evaluating the effects of different CRF:urea ratios on maize yield.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap understanding effects different crf urea
• Optimization of controlled-release fertilizer and urea ratio to increase maize yield by improving dry matter accumulation and translocation in black soil (2026) · Frontiers in Plant Science · doi

  The study only considered a limited number of CRF:urea ratios. The experiment was conducted over two years, which may not be representative of long-term trends. The study did not investigate the economic feasibility of the optimized nitrogen management strategy.

  generallimitations sectionevidence 5/5
  Keywords: study only considered limited number crf urea ratios
• Blended controlled-release nitrogen fertilizer increases rice post-anthesis nitrogen accumulation, translocation and nitrogen-use efficiency (2024) · Frontiers in Plant Science · cited 9× · doi

  There is a lack of knowledge on the effects of blended controlled-release nitrogen fertilizer on rice yield and nitrogen-use efficiency. The conventional practice of split applications of urea has limitations, and there is a need for alternative fertilizer management practices. The study aims to address the gap in knowledge on the optimal nitrogen application rate for blended CRN treatment.

  generalstated research gapevidence 5/5
  Keywords: there lack knowledge effects blended controlled-release nitrogen fertilizer
• Blended controlled-release nitrogen fertilizer increases rice post-anthesis nitrogen accumulation, translocation and nitrogen-use efficiency (2024) · Frontiers in Plant Science · cited 9× · doi

  Further research is needed to investigate the effects of blended CRN on different rice varieties and in different regions. Studies should be conducted to determine the optimal application rate of blended CRN for different soil types and weather conditions. Research is needed to develop more efficient and cost-effective methods for producing and applying blended CRN.

  generalfuture-work sectionevidence 5/5
  Keywords: further research needed investigate effects blended crn different
• Assessing the scope for nano-urea to reduce nitrogen inputs while maintaining rice yields in India (2026) · Frontiers in Sustainable Food Systems · cited 2× · doi

  There is a need to reduce nitrogen inputs in rice cultivation while maintaining yields. Current fertilizer practices are inefficient and contribute to environmental pollution. There is a gap in knowledge on the effects of nano-urea application on rice yield, economic returns, and N use efficiency in India.

  generalstated research gapevidence 5/5
  Keywords: there need reduce nitrogen inputs rice cultivation maintaining

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