Crop Nutrition

More on crop nutrition at the 2017 GRDC Updates

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 […]

The latest on Nitrogen at the 2017 GRDC Updates

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 […]

When do retained stubbles increase the need for nitrogen?

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 […]

Get the most out of soil testing 2017

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, zig zags and […]

Use paddock test strips to get the most out of your fertiliser budget

Paddock nutrient test strips showed two nutrient deficiencies in Justin Wundke’s barley crop. Justin and family run a cropping and prime sheep enterprise in South Australia.
Before sowing last year’s crop Justin knew his paddock could have an issue with sulfur deficiency. Justin set up some test strips in his paddock after […]

What happens to nutrients when stubbles burn?

Most of the nitrogen (N) and carbon (C) contained in crop stubbles is lost when they are burnt. Around 100 kg/ha of urea could be needed to replace the N lost from burning stubble from a high yielding wheat paddock. Substantial amounts of stubble sulfur (S), phosphorous (P) and potassium […]

Workshops unearth promising tactics on the farm

More Profit from Crop Nutrition (MPCN) held a workshop at Keytah, near Moree in north-western NSW. Nick Gillingham manages Sundown Pastoral Company‘s cropping operations on the farm. Some issues with management implications for Nick at Keytah were discussed at the workshop.

Compaction and options to remediate
Phosphorus – removal rates, not banding […]

Last year’s most popular crop nutrition stories

eXtensionAUS Crop Nutrition published 49 articles in 2016. These were the most popular:

Can I burn lime and gypsum with stubble?

Bottom line: Loss of limestone will be minimal, gypsum might lose some solubility.
2. Three reasons why topdressing nitrogen can fail
Not enough rain after topdressing, too wet, too late!
3. The best frost tactics for […]