Urea 300 kg/ha without KCl gave the best leaf number.

potassium chloride · growth · Allium cepa (onion)Positive and negative results

2 papers in the same direction as this claim · 2 in the opposite direction

1. negative
   MOP gave significantly highest disease incidence, large bulbs and bulb moisture.

   INFLUENCE OF DIFFERENT LEVELS OF POTASH ON THE QUANTITY, QUALITY AND STORAGE LIFE OF ONION BULBS · 2010

   Opposite direction

2. negative
   Both NaCl and KCl reduced root growth of Allium cepa in tissue culture.

   Cytogenetic effect of prolonged in vitro exposure of Allium cepa L. root meristem cells to salt stress · 2017

   Opposite direction

3. positive
   NPK Phonska 300 kg/ha with KCl 100 kg/ha gave the best shallot plant height, 47.01 cm.

   Applications of NPK Phonska and KCl Fertilizer for the Growth and Yield of Shallots (Allium Ascalonicum) in Serang, Banten · 2014

   Same direction

4. positive
   The combined NPK Ponska, KCl, Feripos and manure treatment gave the highest shallot height and leaf number.

   Response of Growth and Yield of Shallots to Various Types of Fertilizer in North Minahasa regency · 2022 · compared with 4 fertilization treatment

   Same direction

nitrogen · growth · Allium cepa (onion)Results differ

70 papers in the same direction as this claim · 9 in the opposite direction · 1 reporting no difference from an alternative

1. no effect
   Nitrogen source and rate had only minor effects on leaf area and storage potential.

   Nitrogen Use Efficiency and Onion Yield Increased with a Polymer-coated Nitrogen Source · 2002

   Opposite direction

2. negative
   Increased nitrogen slightly delayed bulb development.

   The phenology of onion bulb development at different sites and its relevance to incomplete bulbing (‘thick-necking’) · 1987

   Opposite direction

3. no effect
   The nitrogen by spacing interaction did not significantly affect stem diameter.

   Effect of Spacing and Nitrogen Fertilizer on the Yield and Yield Component of Shallot (Allium ascalonium L.) · 2015

   Opposite direction

4. no effect
   Onion growth until the 3–4 leaf stage did not appear to be influenced by the N rate before sowing.

   Effects of split application of nitrogen on yield and nitrogen recovery of spring-sown onions and on residual nitrogen · 1998

   Opposite direction

5. no effect
   Nitrogen source did not have significant effects on shallot plant height or leaf number.

   Season, and Nitrogen Source and Rate Affect Development and Yield of Shallot · 2002

   Opposite direction

6. negative
   Higher N dose decreased bulb dry matter.

   THE INFLUENCE OF N SOURCES AND FERTILIZATION DOSES ON DRY ONION (ALLIUM CEPA L.) YIELD AND BULBS SHELF LIFE · 2009

   Opposite direction

7. negative
   Direct seeding and high nitrogen gave the greatest nutsedge height, 92.33 cm.

   Evaluating the Effect of Onion (Allium cepa L.) Sowing Methods on Growth Characteristics of Purple Nutsedge (Cyperus rotundus L.) under Different Levels of Nitrogen Fertilizer · 2017

   Opposite direction

8. no effect
   Nitrogen fertilizer did not significantly affect leaf number or canopy cover.

   Applied Nitrogen Fertilization and Irrigation on Improving Shallot (Allium ascolanicum L.) Growth and Yield on Dry Land in Mesuji, Lampung Province, Indonesia · 2023

   Opposite direction

72 papers more in this group