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Category: Resources

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Managing phosphorus key to crop production

Optimal production, with the help of soil testing and phosphorous application, is the focus for grower Tim Harrington on his property in the south west corner of Western Australia. Tim farms 2700 hectares of canola and malt barley varieties and is currently experimenting with some long season wheat varieties just […]

Soil and plant testing helps manage fertiliser use

  The move from sheep-based farming to a multi-cropping focus brought many challenges for Western Australian farmer Brad Wood. In this case study Brad outlines how understanding the best way to manage stubbles became a focus on his Kendenup property, where he farms barley, wheat, canola, peas and faba beans […]

Four ways acid soils affect crop nutrition

Most growers know that major plant nutrients become less available as soil pH decreases. But there are four ways acid soils can affect crop nutrition. Soils are considered strongly acid when the pH is below 5.5. Serious problems are likely when the pH falls below 4.5. 1. Plant roots and […]

Point and shoot: a brief look at crop sensors for N management

Knowing in-crop nitrogen (N) status is a critical part of good crop nutrition. Crop N sensors can give a real-time estimate of plant N status. This helps gauge if N levels are excessive or deficient (ideally before yield loss occurs).  How sensors work Sensors don’t measure N content directly. They […]

Lessons in crop nutrition captured for the future.

Lessons learnt from the careers of three leading Australian crop nutrition scientists have now been captured in a series of short YouTube videos. In the videos researchers Mark Conyers, Rob Norton and Ross Brennan reveal the big lessons learnt from their careers that are of relevance to modern agriculture., Mark […]

Podcast outlines the importance of K

In a recent GRDC Communities Crop Nutrition podcast, Dr Richard Bell from Murdoch University explained the importance of potassium (K) for optimal plant growth and reducing the effects of stressors such as drought, frost and salinity. K is second only to nitrogen in importance for crop growth. Many soils in […]

Rate more critical than timing of N in poor sandy soils

The efficient use of nitrogen (N) remains critical for closing yield gaps and managing risk in low rainfall and sandy soil environments. In a recent GRDC Communities podcast, Dr Therese McBeath discusses the benefits to wheat and canola from upfront nitrogen (N) applications, even after a legume crop. It seems […]

Things to consider when applying nitrogen fertiliser

There are a few key points to consider before applying nitrogen (N) fertiliser:   Nitrogen is the nutrient removed in the largest quantities in grain at harvest. Pulses in the system can provide some free N. Calculate a few target yields using one of the many tools available that vary yield […]

Looking closer at Colwell-K on heavy soils

Colwell potassium (K) is the go-to K test in many growing regions. Colwell-K measures extractable K and is used to estimate plant-available K.  But interpreting Colwell-K values gets tricky on heavier soils. This is partly because research on critical values has been dominated by Western Australian sandy soils. There is […]

Simple soil sampling

At the recent 2019 GRDC Updates Wagga Wagga, Jason Condon from the Graham Centre for Agricultural Innovation discussed effective soil sampling methods and some cost-saving options. Soil tests provide the analytical data used for efficient nutrient and soil management of agricultural land.  Sampling options Traditionally, a multicore composite sample was […]

Sowing time and conditions affect P requirements.

  The amount of residual phosphorus (P) a crop takes up is largely determined by soil moisture and soil temperature. These conditions can vary significantly across a typical three-month sowing period from April to June. This variation can impact the P fertiliser requirements of crops at sowing. Recent trials in […]

Fertilizer Australia new home for crop nutrition resources

In June 2019, the International Plant Nutrition Institute (IPNI) ceased operations globally, including supporting and developing the information provided through their website. The website contained a significant amount of research and publications by IPNI regional staff and collaborators from across the globe, including local resources developed by Australia New Zealand […]