Spacing of 7.5 cm×15 cm gave the maximum onion marketable yield of 31.24 t/ha.

density · quality: postharvest · Allium cepa (onion)Positive and negative results

10 papers in the same direction as this claim · 1 in the opposite direction · 1 reporting no difference from an alternative

1. negative
   Weight loss was higher at the widest spacing for all onion varieties.

   Bulb Quality and Storability of Onion (Allium cepa L.) as Affected by Varieties and Intra-Row Spacing in Antsokia Gemza, Ethiopia · 2020

   Opposite direction

2. no effect
   Twin-row high planting density was equivalent to the commercial standard in total and marketable yield.

   High Planting Density Twin-row Arrangement Produces Favorable Bulb Size Distribution in Short-day Onion · 2025 · compared with commercial standard

   No difference from an alternative

3. positive
   Increasing plant density up to 45 plants/m2 increased total and marketable bulb yield and bulb quality.

   Response of Onion Yield and Quality To Different Planting Date, Methods and Density · 2017

   Same direction

4. positive
   Closest 7 cm spacing gave higher marketable and total bulb yield than wider spacing.

   Growth and Bulb Yield of Onion (Allium cepa L.) in Response to Plant Density and Variety in Jimma, South Western Ethiopia · 2018 · compared with wider intra-row spacing

   Same direction

5. positive
   123 kg ha-1 nitrogen and 6 cm spacing gave 37.48 t ha-1 marketable yield.

   Optimal Rate of Nitrogen and Intra-Row Spacing for Economical Production of Onion under Irrigated Farming System in Eastern Amhara Region, Ethiopia · 2019

   Same direction

6. positive
   The highest marketable bulb yield, 28.42 t/ha, was recorded at the higher plant population.

   Influence of cultivar and plant density on the growth, bulb yield and quality traits of onion (Allium cepa L.) · 2024

   Same direction

7. positive
   Marketable bulb yield was highest, at 25.24 t ha-1, at the closest intra-row spacing of 5 cm.

   Growth and Yield Response of Shallot (Allium cepa var. aggregatum) Varieties to Intra-Row Spacing in Eastern Amhara, Ethiopia · 2019

   Same direction

8. positive
   Intra-row spacing of 10.5 cm with 82 kg ha-1 N increased marketable onion bulb yield by 3.14 t/ha

   Yield and Yield Components of Onion as Influenced by Intra-Row Spacing and Nitrogen Fertilizer Levels in Rift Valley, Ethiopia · 2023

   Same direction

4 papers more in this group