Crop Nutrition

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Crop Nutrition



All in the ebook – what advisors and growers wanted to know

We’ve created an ebook! Local crop nutrition strategies, informed by recent research, are what we aim for.  Leading researchers toured eastern Australia in 2016 to speak at on-farm workshops. Detailed discussions on each day helped bridge local needs and new science. We published a string of articles in 2016 to […]

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 […]

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 […]

Our top picks from the fertiliser industry conference

New science topped the agenda at the 2017 Australian Fertilizer Industry Conference. Fertilizer Australia hosted the conference in Torquay, Victoria. Of the many presentations, the following two papers are relevant to Australian growers and crop nutritionists. Phosphorus and soil biology Dr Cassandra Schefe works with Monash University. Her research investigates microbe […]

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 […]

Are you losing potassium from your paddock – does it matter?

graphic with text 'Do potassium losses matter', stick madn scratching head considering soil K

Potassium (K) is being gradually removed from Australia’s cropping soils. Since 2002, average crop yields have increased but K fertiliser use has remained static at around 180 kt K/yr. Soil K reserves declined an average of 4 kg K/ha/yr over the last 20 years.  Most cropping paddocks have received no […]

Do you need lime and potassium? Apply both

trail potassium plots with youtube play button

Large areas of West Australian cropping soils have low potassium (K) reserves. Acidity also constrains most of these soils.  Potassium deficiencies have become more widespread with intensive cropping, removal of hay or stubbles, and K fertiliser inputs lower than removal rates. James Easton is the Field Research Manager with CSBP […]

Rob Norton recognised for excellence at fertiliser conference

Rob Norton

Congratulations to Rob Norton, who last night received an award recognising his long contribution to the Fertilizer industry, from Fertilizer Australia. Rob, the Regional Director of the International Plant Nutrition Institute (IPNI), is also the chair of extensionAUS’s crop nutrition Community of Practice. The award was presented at the conference dinner for the 2017 […]

Is Phosphorus building up in your paddock?

a mountain of soil phosphorus with a stickman scratching his head.

Phosphorus may be over applied in Southern Australian grain farms. A recent survey by IPNI found 80% of paddocks had more P applied than removed over a 3–5 year period. Nutrient Performance Indicators (NPIs) revealed that on average, 0.69 kg P is removed per kg P applied. Some farms may […]

Starter and residual P give strong early vigour in the north

Aerial photograph of starter and deep P trial site plots

This season, starter phosphorus (P) is producing strong early crop vigour. Deep P placement effects and the response to starter P are being documented at a long term monitoring site at Terry Hie Hie, in far north New South Wales.   The trial site compares plots with different rates of […]