Does addressing soil constraints change crop nutrition requirements? DAFWA researcher Craig Scanlan runs field trials in central and northern WA. The trials investigate links between soils, seasons and crop nutrition. The focus is how incorporating lime affects yield response to fertilisers. Soil mixing to treat water repellent soils is also […]
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
That’s comprehensive, but with an opportunity crop there’s not always the chance to cover all the bases. […]
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 […]
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 […]
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 […]
Tillage can redistribute phosphorus (P) within the top 10 cm of the soil. P often becomes concentrated at the soil surface, especially in no-till paddocks. Getting P deeper into the soil is important in dry seasons when the active root zones are deeper.
Trials tested the response of wheat to P […]
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. For cereals, […]
High nitrogen (N) fertiliser rates can have long-lasting yield effects in canola-wheat rotations. Since 2010, Grain Orana Alliance has looked at yield and oil responses in canola to increased nitrogen (N) rates. Yield increases often continued well beyond N rates that had been thought reasonable.
There’s a risk of applying […]
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 […]
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 […]