The study identifies a gap in the evaluation

The gap

Evidence profile

Sourced from the stated research gap and stated challenges and future-work section and abstract and inline gaps of the source papers, classified as general, spanning 5 journals.

Supporting evidence — 8 representative gaps

• Optimizing split nitrogen application for enhanced maize yield in slightly saline coastal soils (ECe 3–4 dS m−1) (2026) · Discover Soil · doi

  The study identifies a gap in the current understanding of optimal N fertilizer application methods and timing for maize cultivation in coastal regions. The experiment addresses the need for effective N fertilizer application strategies in slightly saline coastal soils.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap current understanding optimal fertilizer application
• Microbial nutrient management approaches for sustainable rice (Oryza sativa L.) productivity and soil health under field conditions (2026) · Frontiers in Sustainable Food Systems · doi

  The study identifies a gap in the evaluation of biofertilizers on rice quality parameters and soil fertility. The study aims to fill this gap by conducting a two-year field study.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap evaluation biofertilizers rice quality parameters
• High rates of nitrogen fixation and transfer by pigeon pea (Cajanus cajan) to associated crops in a semi-arid agroforestry system (2026) · Agroforestry Systems · doi

  Nitrogen deficiency is a major constraint to crop production in semi-arid areas. The use of synthetic fertilizers can have negative environmental impacts. There is a need to develop sustainable and environmentally friendly approaches to enhance soil fertility and crop nutrition.

  generalstated challengesevidence 5/5
  Keywords: nitrogen deficiency major constraint crop production semi-arid areas
• Effectiveness of Biodegradable Wastes As An Organic Fertilizer Compared to Commercial Fertilizer on the Growth of Abelmoschus Esculentus (Okra) (2026) · Zenodo (CERN European Organization for Nuclear Research) · doi

  The adoption and effectiveness of organic waste fertilizers remain underexplored in many agricultural sectors. There is a need to evaluate the impact of biodegradable waste fertilizers on crop growth and productivity.

  generalstated research gapevidence 5/5
  Keywords: adoption effectiveness organic waste fertilizers remain underexplored many
• Optimizing nitrogen varieties improved sustainability of rice–crayfish co-culture system (2026) · Nutrient Cycling in Agroecosystems · doi

  There is a lack of understanding of the effects of different N fertilizers on soil microbial biomass and rice yield in RC systems. There is a need to identify suitable nitrogen management practices for sustainable rice-crayfish co-culture.

  generalstated research gapevidence 5/5
  Keywords: there lack understanding effects different fertilizers soil microbial
• Optimizing nitrogen varieties improved sustainability of rice–crayfish co-culture system (2026) · Nutrient Cycling in Agroecosystems · doi

  Further studies are needed to explore the long-term effects of different N fertilizer treatments on soil health and ecosystem services. Additional research is needed to investigate the potential of other N fertilizer treatments for improving soil microbial biomass and rice yield in RC systems.

  generalfuture-work sectionevidence 5/5
  Keywords: further studies needed explore long-term effects different fertilizer
• Optimizing nitrogen fertilizer application with green manure for enhancing nitrogen use efficiency and reducing nitrous oxide (N2O) emission from rice field (2026) · Discover Soil · doi

  However, under field condition impacts of substituting chemical nitrogen (N) fertilizer with green manure on N2O emissions from Indian paddy fields have not been adequately assessed.

  generalabstractevidence 4/5
  Keywords: field condition impacts substituting chemical nitrogen fertilizer green manure emissions indian paddy fields adequately assessed
• Microbial nutrient management approaches for sustainable rice (Oryza sativa L.) productivity and soil health under field conditions (2026) · Frontiers in Sustainable Food Systems · doi

  Despite the widespread adoption of biofertilizers, limited research has systematically evaluated rice performance under regenerative nutrient regimes, particularly when biofertilizers are applied in com- bination (Marzouk et al.

  generalinline gapsevidence 4/5
  Keywords: biofertilizers despite widespread adoption limited systematically evaluated rice performance regenerative nutrient regimes particularly applied bination

Questions about this gap