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Tag archive: fertiliser

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, […]

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 […]

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 […]

Chickpeas grow better roots with deep phosphorus

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 […]

What to do about fertiliser after a tough year

After a year with failed crops due to drought, it’s not ‘business as usual’ for the next season’s inputs. Some fertiliser nutrients can remain in the soil if they weren’t taken up by the crop. Demand for other nutrients can increase after drought. Key nutrients after a tough year 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 effective are high Nitrogen rates for canola – wheat rotations?

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 […]

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 […]

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 […]

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 […]

Where exactly are nutrients in the soil? Does stratification matter?

Soils naturally form layers, and when nutrients concentrate in an area it’s called stratification. Soil type and agronomic practices affect stratification. Stratified nutrients can be a problem when nutrients are concentrated somewhere crops can’t access when they need them. Mobile nutrients such as Nitrogen and Sulphur can form bulges below […]

Variable soil demands a flexible fertiliser program

photo of farmer who manages variable soil types

The Hansen’s crop up to ninety percent of their mixed farm at Coomandook, SA. They grow canola, wheat, barley, lupin, oaten hay and lucerne. There are variable soil types across the 8,500 hectare property. It ranges from red sandy loam over clay and limestone, to deep, infertile, non-wetting sands. Variable soil […]