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 nitrogen. […]

Help Australia day mungbeans get what they need

Mungbeans growing in cereal stubble. GRDC
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 […]

Try these new decision support tools to do better in the HRZ

Making fertiliser decisions can be difficult. Paddocks in the HRZ have high yield potential. Actual yields often fall short even in high input cropping systems.
Fertiliser decisions in the HRZ:

Under-fertilising appears to be a major cause of yield gaps in the HRZ.
You get the best return on nitrogen (N) investment with […]

How critical is the critical level?

Critical soil nutrient levels indicate whether a yield response to fertiliser is likely – or not. Their role is to help avoid unnecessary or uneconomic applications of fertiliser. Critical levels are used in interpreting soil test results to make fertiliser recommendations.
The critical level is the value required to achieve […]

Join in the crop nutrition discussion at the GRDC Updates

ExtensionAUS™ is bringing “Ask an Expert” to the 2018 GRDC updates.  
Nutritional legacies from 2017 and implications for 2018.
Senior crop nutrition experts Mike Bell (QAAFI), Mark Peoples (CSIRO), Nikki Seymour (DAF QLD), Richard Daniel (NGA), Jim Laycock (Incitec Pivot), Ehsan Tavakkoli (NSW DPI), and Tim Weaver (CSIRO) will discuss the […]

Test what when to help crop nutrition decisions?

Lab tests help advisors with fertiliser and soil amendment planning. Without lab tests, crop nutrition can be a ‘best guess’. Returns from fertiliser inputs might not be optimal. Yields could suffer.
Soil, plant tissue, and grain testing can guide crop nutrition throughout the season. Soil tests indicate crop available nutrient levels […]

Soil testing 2018

Soil testing informs crop nutrition decisions. Collecting representative samples is the most important step in getting useful information.
Plan your soil sampling

Map non-uniform paddocks into zones. Base the zones on observed soil differences (or EM38 maps if available), and sample them separately.
Use a sampling plan within zones. Grids, zig […]

Top up nutrients after a good year

Nutrients leave the paddock with the grain. A good yield means more nutrients go out and less remain in the soil. Some nutrients may need topping up to maintain yields.
How much topping up?
Different grains contain varying amounts of nutrients. The table below gives estimates of the nutrients removed in […]