The P story so far – Mike Bell
Farming system impact – Lindsay Bell
The impact of a farming system on NUE, WUE, soil-borne disease and profit was discussed at the Goondiwindi and Allora updates. Researchers from CSIRO and DAF Queensland collaborated for this project.
Residual herbicide impact on soil biological function – Nikki Seymour
Nikki Seymour from DAF Queensland presented a paper on how residual herbicides impact soil biological function, at the Dubbo and Goondiwindi updates. Other researchers from DAF and NSW DPI worked on this project.
Filling the yield gap in the HRZ – Malcolm McCaskill
Researchers from Agriculture Victoria, Norton Agronomic, SARDI and Southern Farming Systems looked at the main causes of yield gaps in the high rainfall zone (HRZ). Under-fertilising appears to be the major cause in cropping systems. This paper was presented at the Bendigo update.
Different forms of lime – Paul Damon
Western Australian researchers compared the effect on soil pH of liquid lime, prilled lime slurry and limesand. This paper was presented at the Perth update.
Nutrient redistribution after windrowing – Wayne Pluske
Researchers from Equii, APAL Laboratories, and Wyening Mission Farm looked at how evenly nutrients are redistributed across a paddock when canola and wheat are windrowed. They presented their findings at the Perth updates.
Real-time, in-field soil testing – Mike McLaughlin
Researchers from CSIRO Land and Water, University of Adelaide and Agronomy Solutions explained exciting advances in real time soil testing at the Perth update. The use of infrared spectroscopy sensors in equipment could reduce testing costs and improve precision soil management.
Ameliorating sandy soils – Sam Trengove
At the Adelaide update, Sam Trengove from Trengove Consulting presented a paper on the virtues of ameliorating sandy soils using deep ripping and nutrition applied to the soil surface. Depending on the treatment costs, return on investment ranged from 142 – 521% over three years.
Improving sandy soil productivity – Barry Haskins
Researchers from Ag Grow Agronomy and Research and CSIRO have looked at improving the productivity of the sandy soils typical of SW NSW. Management options such as spreading chicken manure and using strategic cultivation have shown great benefits in the first year of trials. This paper was presented at the Wagga update.
Causes of the yield gap nationally – Roger Lawes
Researchers from CSIRO Agriculture and Food and Cropfacts looked at the difference between actual and potential yield in wheat crops across the Australian grain belt in 2015 and 2016. The cause of the yield gap varied, with no one factor responsible. This paper was presented at the Wagga update.