Category: Tillering

How to fine-tune mid-season nitrogen

Applying nitrogen (N) at multiple times during the season can better match crop demand, minimise risk, and increase returns. Mid-season is a good time to reassess crop N needs. There are a variety of tools to help growers estimate crop N needs. Most use a budget where the N rate […]

Use tissue tests to detect deficiencies

Micronutrients or trace elements are an essential part of crop nutrition. They are as important as the better-known macronutrients nitrogen, phosphorus and potassium. This was a key message on the southern tour of the MPCN II Roadshow in August 2016. Scott and Jillian Vaessen farm at Tabbita in southern NSW. […]

Help Australia day mungbeans get what they need

Some rain around Australia’s northern region saw some last minute mungbean crops go in. The GRDC Mungbean Grownotes suggests we base fertiliser recommendations on: soil test results fallow length yield potential paddock history. That’s comprehensive, but with an opportunity crop there’s not always the chance to cover all the bases. […]

Soil sampling with banded fertiliser

Soil sampling paddocks with a history of precision placement of fertilizer requires special planning. Some elements, such as soil P, remain very close to where they were placed in the soil. Random sampling could give falsely high or low test results depending on how the sampling pattern intersects with the placement […]

Is nitrogen placement different north vs south?

Trials looking at placing nitrogen fertiliser into the soil have shown some different outcomes. In the southern region adding mid-row banding (MRB) to the crop nutrition toolkit looks interesting. A trial showed modest yield gains and better fertiliser uptake. In the northern region, rate looks more important than how nitrogen […]

How to account for stubble nutrients next season

Stubbles can be a source of nutrients for next season. Different crops grown under different conditions have varying amounts of nutrients in their stubbles. Nutrient budgets can consider the amount and type of stubble. How much stubble? Stubble loads can be estimated from grain yield and the amount of growth. […]

How is extension for crop nutrition evolving?

Over 7000 people engaged with the MPCN Northern Region program in 2012 – 2015. The More Profit for Crop Nutrition (MPCN) program aimed to improve returns from fertiliser. The program funded research and extension on soil and crop nutrition. The e-Extension and Training projects integrated the latest advice. Growers and […]

Frost damage and copper deficiency just look similar

leaves showing damage and rolling of leaf tip

Crop damage caused by frost looks a lot like copper deficiency. Leaf damage extends back from the tip of the leaf. Damage to seed heads can be easily confused too. Other than similar symptoms, there’s little evidence yet to link frost and copper deficiency. The location of damage can help […]

How good are in-crop mineralisation predictions?

Crops may source much of their nitrogen (N) from in-crop mineralisation (ICM) of soil organic matter. Of total crop N at harvest, an estimated average 63% came from ICM in a recent Victorian study. Total crop N includes grain, straw and roots. Root N is about 10% of grain and […]

Can you host a research trial in a nutrient deficient paddock?

Do you want to help with crop nutrition research? One of the GRDC’s latest research projects (UQ00082) needs nutrient deficient trial sites. The trial sites will help develop guidelines for nitrogen (N), phosphorus (P), potassium (K) and sulfur (S) for broad-leaved crops in eastern Australia.   For cereals, we know […]