Foliar Fe-NPs and/or Fe-chelated (EDTA) at 0.1% enhanced vegetative growth, flower set and tree nutritional status of Washington navel orange trees.

iron atom · growth · Citrus sinensis (sweet orange)Positive and negative results

9 papers in the same direction as this claim · 1 in the opposite direction

1. no effect
   Raising FeH from 22 to 352 g Fe per tree per year did not significantly increase tree growth.

   By-product Iron-humate Increases Tree Growth and Fruit Production of Orange and Grapefruit · 1998

   Opposite direction

2. positive
   T9, followed by T6 and T7, most effectively improved shoot length, leaf number, and leaf area.

   Effects of Foliar Application of Micronutrients On Growth, Yield and Quality of Sweet Orange (Citrus Sinensis (L.) Osbeck) · 2022 · compared with B @ 0.3% + Fe @ 0.2%

   Same direction

3. positive
   The four-micronutrient spray was most effective for vegetative growth traits in Mosambi orange.

   Foliar Feeding of Micronutrients: An Essential Tool to Improve Growth, Yield and Fruit Quality of Sweet Orange (Citrus sinensis (L.) Osbeck) cv. Mosambi under Non-traditional Citrus Growing Track · 2020 · compared with B @ 0.3% + Fe @0.2% and Zn @ 0.5% + B @ 0.3%

   Same direction

4. positive
   Spray of B and Fe gave the maximum fruit volume of 190.53 cc in sweet orange.

   Micronutrients spray to combat granulation and improve fruit quality of sweet orange [Citrus sinensis(L.) Osbeck] cv. Mosambi under nontraditional citrus growing track · 2023

   Same direction

5. positive
   Foliar micronutrients improved plant growth indices in Washington Navel orange

   RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS · 2000

   Same direction

6. positive
   A 0.6 percent iron spray significantly increased leaf area.

   Effect of Different Concentrations of Iron Sprays on the Incidence of Chlorosis in Sweet Orange (Citrus Sinensis) · 1967

   Same direction

7. positive
   Treatment T2 gave the maximum plant height of 4.39 m in sweet orange.

   Role of Organic and Inorganic Sources of Nutrients on the Vegetative Growth, Yield and Quality of Sweet Orange (Citrus sinensis L.) cv. Sathgudi · 2020

   Same direction

8. positive
   Iron deficiency from absent Fe reduced specific leaf weight in sweet orange.

   Effect of Iron Deficiency on Gas Exchange and Catalase and Peroxidase Activity in Citrus · 2004

   Same directionAbout lacking this nutrient, so it counts the other way round

2 papers more in this group

ethylenediaminetetraacetic acid · growth · Citrus sinensis (sweet orange)Results agree

1 paper in the same direction as this claim

1. positive
   Foliar micronutrients improved plant growth indices in Washington Navel orange

   RESPONSE OF YOUNG WASHINGTON NAVEL ORANGE TREES GROWN ON SLIGHTLY ALKALINE CLAYEY SOIL TO FOLIAR APPLICATION OF CHELATED MICRONUTRIENTS · 2000

   Same direction

nanoparticle · growth · Citrus sinensis (sweet orange)Results agree

6 papers in the same direction as this claim

1. positive
   Nano-fertilizer treatments increased tree canopy volume and leaf area of Valencia orange compared with the chemical fertilizer control.

   IMPACT OF NANO FERTILIZERS AND CHEMICAL FERTILIZERS ON VALENCIA ORANGE (CITRUS SINENSIS [L.] OSBECK) GROWTH, YIELD AND FRUIT QUALITY · 2023 · compared with control

   Same direction

2. positive
   Nanomaterial coatings prevented blue mold on oranges for more than 14 days.

   Antifungal Action of Edible Coating Comprising Artichoke-Mediated Nanosilver and Chitosan Nanoparticles for Biocontrol of Citrus Blue Mold · 2025

   Same direction

3. positive
   Nano-silicon spraying at 300 or 200 ppm significantly increased previous growth aspects of orange trees over the control.

   Effect of some Drip Irrigation and Nano-Silicon Treatments on Growth, Yield and Water Relations of ''Washington Navel'' Orange Trees Grown in New Reclaimed Soils · 2019 · compared with the control

   Same direction

4. positive
   Interaction treatments at the highest concentrations increased stem diameter, to 1.6867 mm per seedling in the first season and 2.41 mm in the second.

   Effect of Foliar Spray with Nano-NPK Fertilizer and Yeast Extract on Growth of Orange (C. sinensis L. Osb.) Washington Navel Variety · 2023

   Same direction

5. positive
   The 1 gm L-1 nano-NPK plus 1 gm L-1 humic interaction gave the best growth indicators, significantly.

   Response of Citrus aurantium L. orange seedlings to the addition of NPK complex nanofertilizer and humic and their effect on vegetative traits and nutrients. · 2023

   Same direction

6. positive
   Nano-NPK foliar spray significantly affected all vegetative growth traits.

   Effect of foliar spraying with fertilizer of nano NPK on vegetative growth and fruit quality of the local Navel Orange cultivar · 2026

   Same direction