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 […]
Category: Strategic Planning
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
Take a look at our five most popular articles and videos from 2017.
This year we published 60 articles on www.extensionAUS/Crop Nutrition These articles covered many different aspects of crop nutrition in the Australian grains industry.
These articles were prepared with and reviewed by, members of our Community of Practice, Australia’s […]
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 […]
Good P supply through the root zone can improve crop growth. Placing some P fertiliser deeper into cropping soils can help supply the needs of maturing crops. Where subsoils are low in P, deep placing P can deliver yield gains.
Looking closer at the roots
Researchers in northern NSW and southern QLD […]