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Open research questions in Agricultural Science and Fertilization

71 gap statements mined from Agricultural Science and Fertilization papers in our 4.5M-paper local library, which holds 719 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Limited understanding of the relationship between land use and soil chemical indicators.

    Depth Wise Assessment of Soil Chemical Indicators under different land uses in District Pulwama of Kashmir valley · 2026 · DOI

  • Further studies can investigate the relationship between land use and soil chemical indicators. Future research can explore the impact of soil management practices on soil chemical indicators.

    Depth Wise Assessment of Soil Chemical Indicators under different land uses in District Pulwama of Kashmir valley · 2026 · DOI

  • There is a need to examine the long-term effects of integrated nutrient management on soil fertility. There is a need to investigate the changes in soil biological activity, carbon sequestration, and nutrient efficiency over successive seasons.

    Integrated nutrient management studies in cauliflower (Brassica oleracea L.) cv. Pusa Snowball K-1 · 2026 · DOI

  • It highlights the need for alternative farming systems that can improve productivity and profitability while enhancing soil health and biological activity.

    Horticulture-Based Integrated Farming Enhances Productivity, Profitability, and Soil Biological Activity in Ustochrepts of the Upper Gangetic Plains, India · 2026 · DOI

  • Opuntia ficus-indica production is critical for both human and animal consumption. The plant's production is affected by various environmental factors. There is a need to develop effective management strategies for improving tender cladode production.

    Effects of organic amendments and humic substances on tender cladode production of Opuntia ficus-indica (L.) Mill. · 2026 · DOI

  • There is a need to evaluate the effects of organic amendments and humic substances on tender cladode production of Opuntia ficus-indica. The optimal combination of substrate and humic/fulvic acid treatments for improving tender cladode production is unknown.

    Effects of organic amendments and humic substances on tender cladode production of Opuntia ficus-indica (L.) Mill. · 2026 · DOI

  • The need for alternative fertilization strategies that balance productivity with sustainability. The lack of research on the effects of organomineral fertilizers on maize growth and nutrient uptake.

    Effects of Organomineral Fertilizer Treatments on Morphological Parameters and Leaf Macronutrient Contents of Maize Plant · 2026 · DOI

  • Future research can focus on addressing the nitrogen deficiency in the substrate. Studies can investigate the effects of different particle sizes on nutrient composition.

    Development and Statistical Evaluation of Fortified Soil Nutrient Formulation from Sugarcane Leaves Biomass for Soil Amelioration · 2026 · DOI

  • There is a need to address the nitrogen deficiency identified in the substrate. A mixed soil ameliorating protocol is necessary for robust soil quality.

    Development and Statistical Evaluation of Fortified Soil Nutrient Formulation from Sugarcane Leaves Biomass for Soil Amelioration · 2026 · DOI

  • The study highlights the need for further research on soil-kernel interactions in different production systems.

    Correlations Between Kernel Quality and Soil Traits under Different Agricultural Practices in Hazelnut · 2026 · DOI

  • There is a lack of data on nutrient requirements and soil nutrient depletion rates of Juniperus and Picea species. Fertilization practices in Turkish forest nurseries are not optimized.

    Investigation of Feeding Activities for Juniperus and Picea Species Grown in Turkish Forest Nurseries · 2026 · DOI

  • There is a gap in research on organic fertilization in rice cultivation. The study aims to fill this gap by examining the effects of sheep wool fertilizer on rice yield and yield components.

    The Effect of Organomineral Fertilization on Yield and Yield Components in Rice (Oryza sativa L.) · 2026 · DOI

  • Future research should focus on multi-location trials, long-term soil health impacts and evaluation of combined biofertiliser consortia to further refine recommendations for broader adoption. This study provides one of the first systematic evaluations of integrated phosphorus management and biofertiliser use for Raikia bean (Phaseolus vulgaris), an under-researched indigenous variety of southern Odisha.

    Optimisation of phosphorus dose with beneficial microorganism application for enhancing growth, yield and economic efficiency in Raikia bean (Phaseolus vulgaris L.) · 2026 · DOI

  • There is a need for innovative and space-efficient production systems in urban areas. The use of organic manure-based substrates in geotextile pockets is a relatively unexplored area of research.

    Transforming horticultural productivity with organic manures in geotextile vertical farming · 2026 · DOI

  • There is a need for sustainable agricultural production systems. There is a lack of understanding of the influence of vermicompost application rates on the growth and yield of cucumber and tomato under greenhouse conditions.

    CHEMICAL-TECHNOLOGICAL CHARACTERISATION OF VERMICOMPOST AND ITS EFFECT ON THE AGROCHEMICAL PROPERTIES OF SOIL AND YIELD OF GREENHOUSE CROPS · 2026 · DOI

  • The lack of effective and sustainable nutrient management strategies for organic rice production. The need to identify optimal application times and species of green manure for maximizing grain yield.

    Growth and Yield of Organic Lowland Rice Under Different Perennial Legume Green Manure Species and Application Times · 2026 · DOI

  • Limited availability of effective and sustainable fertilizer options. Need for improved crop yields and food security.

    Assessment of cricket frass as a sustainable organic fertilizer: Effects on seedling establishment, growth and fruit yield of zucchini (Cucurbita pepo) · 2026 · DOI

  • There is a need to improve crop productivity and nutrient use efficiency in sandy soils.

    Enhancing fertilizer use efficiency in Mentha spicata L. through biochar-based integration with NPK in sandy soils · 2026 · DOI

  • Limited land availability for dedicated forage production. Acidic soils constrain crop growth and productivity.

    Cultivar and planting density effects on biomass yield and forage quality of Moringa oleifera on acidic soils in subtropical Bangladesh · 2026 · DOI

  • The study was conducted on a specific soil type (acidic terrace soil) and may not be generalizable to other soil types. The experiment was conducted over a limited period (one year) and may not capture long-term effects.

    Cultivar and planting density effects on biomass yield and forage quality of Moringa oleifera on acidic soils in subtropical Bangladesh · 2026 · DOI

  • The study had limited replicates, which may have affected the statistical power. The blocking structure helped account for spatial heterogeneity and yielded a reliable estimate of experimental error.

    Assessment of cricket frass as a sustainable organic fertilizer: Effects on seedling establishment, growth and fruit yield of zucchini (Cucurbita pepo) · 2026 · DOI

  • The study identifies a research gap in the understanding of the effects of fortified farm yard manure on soil health and crop yield. The study aims to fill this gap by evaluating the effects of different doses of fortified farm yard manure on Indian mustard production.

    Fortified farm yard manure to bio-stimulate nutrient availability and production of Indian mustard · 2026 · DOI

  • Nutrient limitations, particularly low OM, N deficiency, and reduced Mn-Zn availability, necessitate improved fertilization practices and targeted soil management.

    Soil Nutrient Status and Fertility Assessment of Rice Cultivation Areas in Keşan, Türkiye · 2026 · DOI

  • Further research on optimizing the nutrient quality of LOF - The application of LOF in other types of plants and farming…

    Addition of Eco Enzyme as a Biostimulant for Liquid Organic Fertilizer for the Growth of Curly Lettuce (Lactuca sativa L.) in the Kampoeng Pintar Oase Tembok Gede Vertical Garden · 2026 · DOI

  • The lack of optimal nutrient quality in LOF - The need for alternative fertilizers that support food…

    Addition of Eco Enzyme as a Biostimulant for Liquid Organic Fertilizer for the Growth of Curly Lettuce (Lactuca sativa L.) in the Kampoeng Pintar Oase Tembok Gede Vertical Garden · 2026 · DOI

Most-cited papers in Agricultural Science and Fertilization

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Open questions raised by papers listed on this page include: (1) Future research can explore the impact of soil management practices on soil chemical indicators (“Depth Wise Assessment of Soil Chemical Indicators under different land uses in…”, 2026); (2) There is a need to examine the long-term effects of integrated nutrient management on soil fertility (“Integrated nutrient management studies in cauliflower (Brassica oleracea L.)…”, 2026); (3) There is a need to develop effective management strategies for improving tender cladode production (“Effects of organic amendments and humic substances on tender cladode production…”, 2026); (4) The lack of research on the effects of organomineral fertilizers on maize growth and nutrient uptake (“Effects of Organomineral Fertilizer Treatments on Morphological Parameters and…”, 2026); (5) Future research can focus on addressing the nitrogen deficiency in the substrate (“Development and Statistical Evaluation of Fortified Soil Nutrient Formulation…”, 2026). 71 gap statements have been mined from Agricultural Science and Fertilization papers in our 4.5M-paper local library, which holds 719 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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