Published: 1 Mar 2016
- Sunflower are moderately tolerant to a range of soil constraints and prefer a friable soil surface for best crop establishment.
- Use soil tests to target nutrient management for both optimal oil and maximum grain yields.
- Nitrogen (N) is the nutrient taken up in the greatest quantities by sunflower and is essential for many plant processes.
- Excessive levels of N can reduce oil content while insufficient N will limit crop yields.
- Phosphorus (P) is the second most frequently limiting nutrient for sunflower crops.
- If arbuscular mycorrhizal (AM) fungi levels are low, supplying adequate P and zinc is very important.
- Germinating sunflower seed is very sensitive to fertiliser placed in the seed trench; growers should aim to limit the amount of fertiliser placed in close contact with the seed and use side banding to limit contact.
Use www.grdc.com.au/TT-SunflowerNutrition to keep up-to-date
GRDC Project Code PAL 00019
Region North, South
Region: North; South
Was this page helpful?