Tag archive: nitrogen

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 […]

How much nitrogen can pulses supply to the next crop?

Howard Cox, DAF QLD Growing pulses can increase soil nitrogen (N) stocks. Researchers in QLD have developed some rules of thumb to estimate pulse-N contribution to the next cereal crop. The rules apply to chickpeas and faba beans. Calculating N from pulses Good crops In a good chickpea or faba […]

Nitrogen topical at 2018 GRDC Updates

Keep up with the latest research information on nitrogen. The following papers and key messages were presented at the GRDC Updates across Australia in February and March 2018. Improving N efficiency using mid-row banding – Graeme Sandral Mid-row banding urea at sowing provided a higher yield and profit response in […]

Research into mid-row banding benefits continues

In 2016, Agriculture Victoria researcher Ashley Wallace conducted mid-row banding (MRB) trials in Victoria. These were part of the GRDC/Agriculture Victoria Regional Research Agronomist program.The trials compared MRB nitrogen fertiliser in-crop to other application methods. MRB is when fertiliser is applied in concentrated bands below the surface to every second […]

What happens in the year after a hayed-off crop?

A hayed-off crop can make estimating available nitrogen (N) trickier than usual. Deep N testing is the best way to assess N resources.Estimates and actual results from deep soil testing were very different in recent research by Birchip Cropping Group. After haying off there’s potential yield benefit next season from leftover […]

What is the fate of nitrogen fertiliser?

Do you know the fate of nitrogen (N) fertiliser that’s applied to cropping paddocks?  How much ends up in the crop, soil or lost? Victorian researchers have been working with a traceable N fertiliser to find out. The standard assumption is the crop takes up half the fertiliser N in […]

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 […]

The best resource on fertiliser N and legumes in the northern region

Balancing legume N with fertiliser inputs can be tricky. Legumes can affect soil N dynamics in unexpected ways. For example, chickpeas grown in low N soil can fix a large amount of N. But in high N soils, chickpeas use the soil N and fix less from the atmosphere. They […]

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 […]

Mid-row banding promising for in-crop Nitrogen

Mid-row Banding (MRB) places nitrogen (N) fertiliser below the soil surface in every second crop inter-row. Recent research looked at using MRB for in-crop N applications. In-season N applications aim to meet a crop’s peak N demand and improve the efficiency of crop uptake. MRB can reduce some risks that […]