How crop nutrition affects onions

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

How to increase onion yield

Onions and garlic have a relatively low nutrient uptake efficiency, so it is important to apply nutrients as close as possible to the rooting zone frequently and in readily available forms.

How to increase onion bulb size

Onion bulb size is mostly influenced by planting density, however good crop nutrition, particularly nitrogen, phosphorus and sulphur are essential to achieve good onion bulb size.

How to increase onion bulb weight

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

How to influence onion bulb number

The number of onions produced is influenced mainly by plant density so it is important to manipulate sowing density and nutrition to provide maximum yields of a desired bulb size. A balanced crop nutrition is important to help to reach yield potentials.

How to improve onion quality

Nutrition programmes based on crop nutrient needs are key to influencing dry matter content, firmness and storability as well as taste and pungency, all important factors in determining the quality of onion crops.

How to maximise onion dry matter content

The majority of onion crops are grown for the fresh market so it is important to maximise dry matter. Nitrogen and potassium are the most important nutrients influencing dry matter content of onion bulbs.

How to improve onion 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.

How to manage onion taste and pungency

Taste and pungency are key quality characteristics of the onion crop. They vary among types and cultivars however it is well known that good nutrition is essential to manage these characteristics.

How to improve onion skin appearance

A uniform skin is a major element of onion appearance for the fresh market. A balanced nutrition program is also essential to ensure that the overall skin quality of an onion crop meets market demands.

How to reduce onion storage rots

Balanced crop nutrition can help to reduce storage rots by promoting healthier plants. Onions need a period of curing or drying in order to seal the neck, prevent invasion of diseases and rot and to create a bright, crack-free skin.

How to avoid chilling injury in onions

Nutritional programs containing soluble calcium can help to protect crops against chilling injury, which can lead to cell breakdown.

Onion nutrient deficiencies

Identify and diagnose if your onions are suffering from nutrient deficiencies and learn more about the symptoms and causes and how to control or correct the deficiency

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