How nutrient mangement can affect onions

Onion crop nutrition program

Onion crop nutrition program

Yara's crop nutrition programs for onions can help you to achieve excellent crop performance and maximise the yield and quality of all allium crops.
Increasing onion bulb size

Increasing onion bulb size

Planting density is a very important management factor in determining bulb size in onion crops. In addition, good crop nutrition can help growers to achieve a desired diameter. Nitrogen, potassium and phosphorus are essential to influence onion bulb size.
Increasing bulb weight

Increasing bulb weight

A balanced crop nutrition program can help to improve overall yield by increasing onion bulb weight.
Influencing onion bulb number

Influencing onion bulb number

The number of onions produced can be influenced by a variety of factors, for example, plant density. Planting crops at higher densities can result in greater numbers of onion bulbs, but of smaller size. Thus, it is important to manipulate sowing density...
Improving onion quality

Improving onion quality

It is particularly important to ensure that environmental and growth constraints do not limit onion bulb yield, and thereby quality. Taste and pungency are important elements in determining the quality of onion crops.
Maximising onion bulb dry matter content

Maximising onion bulb dry matter content

The majority of onion crops are grown for the fresh market. Bulbs should be sufficiently dry for the intended purpose. Most common bulb onions have 10-12% dry matter. Onions grown for dehydration require higher dry matters of 17-20%. Nitrogen and...
Improving onion bulb firmness

Improving onion bulb firmness

Firmness is a critical characteristic of onion crops, particularly in dry bulb onions which are stored for long periods. Growers can influence bulb firmness by applying balanced nutrition.
Managing taste and pungency of onion bulbs

Managing taste and pungency of onion bulbs

Taste and pungency of onions are key quality characteristics of this crop. They vary among types and cultivars. Pungency is largely due to the level of sulfur - based non-protein amino acids they contain. Sweetness can be assessed by the levels of sugars...
Improving onion skin appearance and condition

Improving onion skin appearance and condition

A uniform skin is a major element of onion appearance for the fresh market. In addition, the strength of the onion skin is important to help keep diseases and storage problems away. Skin cracking can be a result of poor soil moisture. A balanced nutrition...
Reducing storage rot

Reducing storage rot

Onions should be mature and dry when harvested. Onion bulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and...
Reducing storage rot

Reducing storage rot(6)

Onions should be mature and dry when harvested. Onion bulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and...
Avoiding chilling injury

Avoiding chilling injury

Onions thrive best when temperatures are cool during early development and then warmer and sunny during maturity. Nutritional programs containing soluble calcium can help to protect crops against chilling injury, which can lead to cell breakdown.
How to increase onion yield

How to increase onion yield

Onions have a relatively low nutrient uptake efficiency, due to their shallow root system characterised by thick roots with very few and short hairs. So to achieve optimum yields it is important to apply nutrients as close as possible to the rooting zone...
Reducing storage rot

Reducing storage rot(4)

Onions should be mature and dry when harvested. Onion bulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and...
Reducing storage rot

Reducing storage rot(5)

Onions should be mature and dry when harvested. Onion bulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and...
Reducing storage rot

Reducing storage rot(2)

Onions should be mature and dry when harvested. Onion bulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and...
How nutrient mangement can affect onions

Onion nutrition advice

Browse the complete list of all the onion articles pages to see how crop nutrition affects onion yield, quality, health or effect on the environment and see the roles of different nutrients.

Nutrient deficiencies-Onions