This guide provides information for good nutrient management of Australian onion crops.

This nutrient management guide is designed for onion growers and crop advisors who aim to produce high-quality crops without wasting nutrients. It covers:

• An overview of onion growth and nutrient needs
• Information on onion root growth and development
• An overview of nutrient needs of onion crops
• An approach to nutrient budgeting, determining nutrient needs and nutrition strategies for onions
• An overview of key soil factors affecting nutrient availability and uptake, especially pH
• Information on key nutrients and use for onion crops
• An introduction to crop nutrition monitoring
• Information on how nutrients get from the soil into the plant and nutrient interactions
• Information on fertiliser nutrient composition and concentration
• Information on nutrient stewardship.