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Onion and Garlic
All onion articles
How crop nutrition affects onions
Onion and Garlic Crop Nutrition Program
Yara's crop nutrition programmes for onions can help you to achieve excellent crop performance and maximise the yield and quality of all allium crops.
How to Increase Onion Bulb Size
Planting density is a very important management factor in determining bulb size in onion crops.
How to Increase Onion Bulb Weight
A balanced crop nutrition program can help to improve overall yield by increasing onion bulb weight.
How to Influence Onion and Garlic Bulb Number
The number of onions produced is influenced mainly by plant density.
How to Improve Onion and Garlic Quality
Nutrition programmes based on crop nutrient needs are key to influencing both yield and quality.
How to Maximise Onion Dry Matter Content
The majority of onions and garlic crops are grown for the fresh market. Bulbs should be sufficiently dry for the intended purpose.
How to Improve Onion Firmness
Firmness is a critical characteristic of onion crops, particularly in dry bulb onions which are stored for long periods.
How to Manage Onion Taste and Pungency
Taste and pungency are key quality characteristics of the onion crop.
How to Improve Onion Skin Appearance and Condition
A uniform skin is a major element of onion appearance for the fresh market.
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
Onions and garlic thrive best when temperatures are cool during early development and then warmer and sunny during maturity.
How to Increase Onion and Garlic Yield
Yield potentials are reached on freely drained soils where water is not limiting and nutrients are readily available.
How to Reduce Onion Neck Thickness
An adequate dimension of the onion neck will prevent invasion of diseases.
How to Improve Onion and Garlic Health
Fertilizer programs starting early during establishment and vegetative growth are needed to ensure nutrients don’t limit onion bulb quality.
How to Controll Onion Pests and Diseases
It is particularly important to ensure that environmental and growth constraints do not limit bulb formation and bulb quality.
Onion Market Requirements
The majority of onions are grown for the fresh market and are usually graded prior to marketing.
Fertilization Management
In order to maximise the fertilizer use efficiency, timing of nutrient applications must match crop demand.
Agronomic principles in onion production
Onions can survive at temperatures of - 6°C, but are killed when conditions drop below -8°C.
Onion Types
Modern cultivated types of onion fall into two main groups - the common onion and aggregatum group.
World Onion Production
54 million tonns of dry onions are produced annually, with the crop being grown across 3 million hectares in over 134 different countries.
Crop Protection
Onions are slow to emerge.
Role of Nitrogen in Onion Production
Nitrogen is a key component of enzymes, vitamins, chlorophyll and other cell constituents, all of which are essential for crop growth and development.
Role of Phosphorus in Onion Production
Phosphorus is a component of nucleic acids (DNA and RNA) and essential for energy transfer within the plant.
Role of Potassium in Onion Production
Potassium is involved in the production and transport of carbohydrates and sugars to the bulb, enzyme activation and synthesis of proteins.
Role of Calcium in Onion Production
Calcium is a key component of cells maintaining the structure of cell walls and stabilizing cell membranes.
Role of Magnesium in Onion Production
Magnesium is required for many processes including transfer of energy and protein synthesis.
Role of Sulfur in Onion Production
Sulfur is an important component of enzymes and other proteins, and is required for chlorophyll formation.
Role of Boron in Onion Production
Boron is involved with carbohydrate metabolism and protein synthesis.
Role of Copper in Onion Production
Copper has a key role to play in lignin formation.
Role of Iron in Onion Production
Iron is associated with chlorophyll formation and photosynthesis.
Role of Manganese in Onion Production
Manganese is required for chlorophyll formation and oxide-reduction reactions in cells.
Role of Molybdenum in Onion Production
Molybdenum is an important component of nitrate reductase and thus involved in nitrogen metabolism as well as the synthesis of pigments and chlorophyll.
Role of Zinc in Onion Production
Zinc is important for the development and function of growth regulators (e.g. auxin) that influence internode elongation.
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