A comprehensive technical report explores the yield gap typical in commercial wheat and canola crops in the high rainfall zone (HRZ) of southern Australia. A previous report concluded that the yield gap was due to insufficient fertiliser being applied to achieve potential yield. The main barrier to supplying sufficient nutrients […]
Pulse crops can be a valuable source of nitrogen within cropping systems. The amount of N fixed by legumes can vary substantially and is affected by the species of crop, soil and seasonal conditions and crop management factors.
In this webinar, QDAF senior agronomist Howard Cox and researcher Professor David Herridge, […]
Best practice crop nutrition seeks to make the most of your fertiliser budget and minimise environmental impact. The ‘Four Rs’ is a nutrient management framework that aims to match nutrient supply with crop needs.
The Four Rs
The four components of the framework are:
The RIGHT source fertiliser
At the RIGHT rate
Micronutrients or trace elements are often suspected to be deficient in some Australian cropping regions. Some trace element applications are now routine. But recent trials in areas with reported deficiencies have shown little response to micronutrient applications.
In southeastern Australia, 23 trials were run on wheat, barley and canola […]
You might know how much you spent on fertiliser last season, but do you know if it was a good investment? Review at the end of the season can answer that question. Do you know how to assess how well last season’s crop nutrition management shaped up?
In this webinar presented […]
Waterlogging affects nutrients in soils, and reduces the ability of plant roots to take up nutrients. Root functions require oxygen. Root growth and access to soil nutrients are restricted in waterlogged soils.
Soil test before planting the next crop to check nutrient status. Nitrogen (N), potassium (K), sulphur (S) and […]
High grain yields mean high rates of nutrient removal, in particular, nitrogen (N) and phosphorous (P). Soil fertility in the paddock declines unless nutrients are replaced. Soil and grain tests help you make better nutrient budget decisions.
Reference values for nutrient removal are just an indication (especially for P):
A 6-tonne […]
Trace elements – Chris Dowling
Trace elements can greatly influence crop production and may increase profitability. Chris Dowling from Back Paddock Company presented at the Gulargambone Update. Plant tissue testing for micronutrients and likelihood of responses.
The importance of phosphorus – Chris Guppy
Crop response to P and other nutrients is influenced by […]
Managing N loss risks – Chris Dowling
Practical N management can minimise the economic impact of N loss events. Chris Dowling from Back Paddock Company presented at the Bellata Update.
Denitrification and managing nitrogen loss risk – key factors affecting loss.
Nitrogen application – Richard Daniel
The rate of nitrogen application drove yield and […]
Microbes use nitrogen (N) from the soil to decompose stubbles. When stubbles have a high carbon: nitrogen (C: N) ratio, soil mineral N is tied-up. Cereal stubbles have a high C: N ratio of around 80:1. Canola stubble C:N ratios are higher and legume stubbles are lower.
As stubbles break down […]