application · Nutrient: content · Allium cepa (onion)

NITROGEN FERTILIZATION OF ONION IN SANDY SOILS · 1998

• positive
  Soil N plus higher-level foliar spray (4.6 kg N/f) significantly increased N, P and K uptake of the onion plant 100 days after sowing.

Vegetative Growth and Chemical Parameters of Onion as Influenced by Potassium as Major and Stimufol as Minor Fertilizers · 2011

• positive
  The highest onion bulb N, P and K values occurred with 150 units of K2O and 3g/l Stimufol.
• positive
  The highest onion bulb Cu value occurred with 150 units of K2O and 3g/l Stimufol.
• positive
  The highest onion bulb Fe, Mn and Zn values occurred with 150 units of K2O and 3g/l Stimufol.

Response of Onion to Soil and Foliar Application of Iron on Entisols · 2013

• positive
  Soil RDF plus FYM plus FeSO4 gave the highest onion iron uptake, 4.45 kg ha-1.

  compared with RDF + FYM + FeSO4 @ 20 kg ha-1 + 0.5 % FeSO4 at 30 and 45 days after transplanting

• positive
  Soil RDF plus FYM plus FeSO4 gave the highest onion nitrogen uptake, 128.13 kg ha-1.

  compared with RDF + FYM + FeSO4 @ 20 kg ha-1 + 0.5 % FeSO4 at 30 and 45 days after transplanting

cited by 1 paper here

Response of Onion Yield and Its Chemical Content to NPK Fertilization and Foliar Application of Some Micronutrients · 2017

• positive
  The combined treatment gave the highest onion bulb N, P, K, Cu, Fe and Zn.

cites 1 paper here

Influence of different sources, levels and methods of application of potash on growth, yield, nutrient uptake and bulb quality of Rabi onion in inceptisol · 2018

• positive
  The basal MOP plus foliar SOP treatment recorded higher nitrogen, phosphorus and potassium uptake.
• positive
  The basal MOP plus foliar SOP treatment recorded higher sulphur, Fe and Mn uptake.
• positive
  The basal MOP plus foliar SOP treatment recorded higher Zn and Cu uptake.

The Influence of Irrigation Water Salinity and Humic Acid on Nutrient Contents of Onion (Allium cepa L.) · 2020

• positive
  Soil humic acid application positively affected P, Mg and Fe contents of bulbs.
• positive
  Soil humic acid application positively affected Zn and B contents of bulbs.

Effect of Some Growth Stimulants and Different Levels of Potassium and Biofertilizer on Growth Aspects, Bulb Yield and Quality Attributes of Onion (Allium cepa L.) · 2022

• positive
  Copper foliar application increased sulfur and copper in onion leaves.

Using of Biofertilizers and Some Micronutrients in Improving Onion Productivity under Siwa Oasis Conditions · 2023

• positive
  Biofertilizer inoculation and micronutrient spray synergistically enhanced mineral uptake and metabolism.

Combined Soil Microorganism Amendments and Foliar Micronutrient Nanofertilization Increased the Production of Allium cepa L. through Aquaporin Gene Regulation · 2023

• positive
  Nanoencapsulated foliar nutrients improved nutrient penetration and mobilization more than free fertilizers.

  compared with free-form fertilizers

Onion quality and yield after agronomic biofortification with selenium · 2024

• positive
  Foliar selenium was more efficient than soil application for onion biofortification.

  compared with soil application

• positive
  At the yield-maximizing dose, foliar selenium produced 0.487 mg Se kg-1 in onion dry mass.

  compared with soil applications

Response of soil and foliar micronutrients application on nutrient uptake and seed yield of onion · 2024

• positive
  GRDF with two foliar sprays of Phule micro grade II increased total K uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total Zn uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total Fe uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total Cu uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total N uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total P uptake
• positive
  GRDF with two foliar sprays of Phule micro grade II increased total Mn uptake

Magnesium Oxide Nanoparticles Enhance Growth Performance, Spectral Vegetation Indices, Yield Quantity, and Quality of Green Onion under Egyptian Conditions · 2025

• positive
  Foliar application of MgO-NPs improved the accumulation of N, P, K and Mg content in onion plant compared with the control treatment.

  compared with control treatment

Impact of foliar application of vermiwash on growth, nutrient uptake and yield of onion · 2025

• positive
  Full RDF with vermiwash gave higher onion manganese and copper uptake at harvest.
• positive
  75 per cent RDF plus 20 per cent vermiwash gave significantly higher onion uptake of nitrogen, phosphorus and potassium.
• positive
  75 per cent RDF plus 20 per cent vermiwash gave significantly higher onion uptake of manganese and copper.