Crop Nutrition

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Crop Nutrition



Showy test strip? You need more nutrients

Agronomists and growers use fertiliser test strips to see if a crop might respond to additional nutrients. Test strips are bands of a specific nutrient, put out in the cropping paddock. A nutrient is applied at a higher rate than the fertiliser base rate in the paddock. Ideally, another strip […]

Soil carbon key to nutrient renewal

Jeff Baldock, CSIRO discusses Soil Carbon Decline

  Recent research into organic soil carbon and its effect on soil nutrient levels suggests care must be taken to avoid mining nutrients from our agricultural soils. CSIRO research scientist Jeff Baldock outlined his concerns in a recent video discussion with GRDC Communities Crop Nutrition. Nitrogen (N) is being mined […]

A closer look at sulphur in the southern region

Critical values for sulphur (S) in the southern region may be lower than originally thought. Established critical values are 4.5 mg/kg for wheat and 7 mg/kg for canola. These values are based primarily on WA data that use the KCl-40 S test. Do these values apply in other regions? A […]

Take our survey and have your say- you could win!

Tell us what you think for your chance to win an 8” tablet! Your feedback is important to us. It helps us improve our products and services, as well as plan for an exciting future of crop nutrition extension. We have put together a short survey as an opportunity for […]

Sow close to the row to boost crops after a dry year

On-row or edge row sowing means sowing a new crop immediately alongside or in the previous crop row. Grain crops are usually sown inter-row (between the old crop rows). On-row sowing for phosphorus On-row sowing can make use of last year’s phosphorus (P) fertiliser. Phosphorus is not a very mobile […]

Get better precision with grain tests

Grain nutrient testing is a quick and easy way to see what nutrients are leaving the farm with the grain. Incitec Pivot trials at the Darling Downs, western Downs and in northern New South Wales have looked at sorghum grain test results from the last three years of summer crops. […]

Dig deeper to know nutrient levels

Soil testing in the 0-10 cm zone has traditionally been used for phosphorus-based fertiliser recommendations. Deeper tests are often used to gauge nitrogen (N) availability, especially when mineral N has leached deeper after significant rain. But there are other nutrient and chemical constraints that can be better analysed by soil […]

2018 in review- Crop nutrition implications for 2019

In November 2018, plant nutrition consultant Rob Norton presented growers and advisors with yet another insightful review of the 2018 cropping season, and how it may impact crop nutrition in 2019. Rob’s webinar focussed on the more strategic nutrient management decisions. These are longer-term objectives (3-5 years), planned at the […]

How to assess new crop nutrition products

Every year, new fertilizers and other crop nutrition products come onto the market. Crop response to essential plant nutrients is well understood. What is less clear is the efficacy of other crop nutrition products. Do microbial amendments, acids, plant, and animal extracts, and other compounds also enhance nutrient use? Legislation […]

Crop nutrition discussions at the GRDC Updates

GRDC Communities is bringing “Ask an Expert” to the 2019 GRDC updates.   Crop nutrition implications after the drought Senior crop nutrition experts including Mike Bell (QAAFI), Sean Mason (Agronomy Solutions) Richard Daniel (NGA), Jim Laycock (Incitec Pivot), Maurie Street (GOA) will discuss the year ahead. Three “early risers” forums […]

What is the benefit of deeper phosphorus sampling?

Testing deep phosphorus (P) can improve fertiliser recommendations with a more accurate look at soil P stocks. It can help to know how much P is in the profile, and where it is. The topsoil is usually the most nutrient dense part of the soil. Maturing crops also rely on […]

What is the phosphorus buffering index?

The Phosphorus Buffering Index (PBI) approximates a soil’s ability to ‘fix’ phosphorus (P). Soils with a high PBI quickly and tightly bind fertiliser P making it unavailable to plants. Low PBI soils can’t lock-up much P, leaving most applied P for plant uptake. Use PBI to improve interpretation of critical […]