Fenugreek green manure with bio-fertilizer and mineral N at 120 kg fed-1 gave the highest total onion yield, bulb weight and bulb diameter.

Trigonella foenum-graecum · yield · Allium cepa (onion)Results agree

1 paper in the same direction as this claim

1. positive
   Onion with one fenugreek row returned ₹544247/ha versus Rs.511719/ha for sole seed onion.

   ECONOMICS OF DIFFERENT COMBINATIONS OF ONION + BEET LEAF AND ONION + FENUGREEK INTERCROPPING SYSTEM · 2023 · compared with seed onion sole crop

   Same direction

inoculation · yield · Allium cepa (onion)Positive and negative results

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

1. positive
   Combined PSB and Azospirillum inoculation gave maximum onion yield parameters.

   Yield and Quality of rabi Onion (Allium cepa L.) Influenced by Integrated Nutrient Management · 2018

   Same directionCited by this paper

2. negative
   Nematode inoculation reduced onion bulb weight by 7 to 82%.

   Effect of Rice Root-Knot Nematode on Growth and Yield of Yellow Granex Onion · 2002

   Opposite direction

3. no effect
   Inoculated and un-inoculated onion plants showed no significant difference in plant height and number of leaves at 4 weeks after transplant.

   Effect of Arbuscular Mycorrhizal Fungi and Chemical Fertilizer on Growth and shoot nutrients content of Onion under Field Condition in Northern Sudan Savanna of Nigeria · 2013 · compared with un-inoculated plants

   Opposite direction

4. no effect
   In high-P soil, onion bulb weight, root infection and spore numbers were not influenced by added P or added mycorrhizal inoculum.

   The Effect of Soil Phosphorus Levels on Mycorrhizal Infection of Field-grown Onion Plants and on Mycorrhizal Reproduction1 · 1981

   Opposite direction

5. negative
   EM reduced shallot yield by about 14% compared with the control.

   No Effect of Biostimulants on the Growth, Yield and Nutritional Value of Shallots Grown for Bunch Harvest · 2022 · compared with control

   Opposite direction

6. negative
   Replacing half of recommended NPK with compost and biofertilizer yielded less shallot bulbs than full NPK.

   INFLUENCE OF PLANT DENSITY, COMPOST AND BIOFERTILIZER ON TRUE SHALLOT SEED GROWTH IN ALLUVIAL SOIL · 2020 · compared with 100% R-NPK

   Opposite direction

7. negative
   Bulb weight of onion was reduced by 31.5% to 64.2% at 26500 and 212000 P. penetrans per microplot in field microplots

   Pathogenicity of Pratylenchus penetrans on onion. · 2009

   Opposite direction

8. no effect
   Beneficial microorganisms did not increase bulb weight, bulb number or diameter in either shallot cultivar.

   Growth and Yield of Shallot (Allium cepa L. Aggregatum group) with Application of Beneficial Microorganisms · 2019

   Opposite direction

84 papers more in this group

nitrogen · yield · Allium cepa (onion)Positive and negative results

156 papers in the same direction as this claim · 23 in the opposite direction · 4 reporting no difference from an alternative

1. negative
   Onion yield decreased by 95 Mg·ha -1 for each 25% increase in the proportion of urea in fertilizer blends.

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

   Opposite directionCited by this paper

2. negative
   High combined nitrogen and sulphur rates had an antagonistic effect on bulb nutrient uptake, yield components and yield.

   Nutrient uptake and yield of onion as influenced by nitrogen and sulphur fertilization · 2008

   Opposite direction

3. negative
   Total yield at the lowest nitrogen rate was lower than at higher rates.

   Bolting, Yield, and Bulb Decay of Sweet Onion as Affected by Nitrogen Fertilization · 2003 · compared with higher N rates

   Opposite direction

4. no effect
   Yields of cabbage, carrots and onions were generally unaffected by N rate, except in cabbage in 2000.

   Assessment of Chlorophyll and Nitrate Meters as Field Tissue Nitrogen Tests for Cabbage, Onions, and Carrots · 2004

   Opposite direction

5. negative
   N, P and K addition depressed onion yield in the first year.

   N–P–K FERTILIZER EFFECTS ON YIELD, COMPOSITION AND RESIDUES OF LETTUCE, CELERY, CARROT AND ONION GROWN ON AN ORGANIC SOIL IN QUEBEC · 1975

   Opposite direction

6. negative
   An N rate of 120 kg ha−1 led to a yield drop in onion.

   Onion (Allium cepa L.) Yield and Growth Dynamics Response to In-Season Patterns of Nitrogen and Sulfur Uptake · 2020

   Opposite direction

7. no effect
   Higher fertilization did not increase onion yield beyond stated N, P and K levels.

   OPTIMAL SOIL pH AND SUFFICIENCY CONCENTRATIONS OF N, P AND K FOR MAXIMUM ALFALFA AND ONION YIELDS ON ACID ORGANIC SOILS · 1980

   Opposite direction

8. no effect
   Nitrogen manuring had practically no effect on yield.

   STUDIES IN THE PHYSIOLOGY OF THE ONION PLANT · 1947

   Opposite direction

175 papers more in this group