Previous research has shown the movement of phosphorus to the plant roots in the soil water is restricted in drier soil conditions. Fluid fertilisers are able to diffuse away from the point of application in lower soil moisture conditions and are less likely to be fixed by calcium in soils with high levels of calcium carbonate.
Fluid delivery systems can vary: all of the fungicide can be put below or alongside the seed in the soil to protect the seedling roots, or it can be split, with half placed above the seed on the furrow, which will allow it to wash into the soil and protect the crown roots as they emerge
SARDI: Amanda Cook
Fluid delivery systems are becoming more popular as producers look to upgrade their machinery and systems.
This project looked to evaluate if there was an advantage in using a fluid delivery system at seeding over current systems.
The trial aims to investigate fluid delivery systems, looking at increasing nutrient use efficiency by using fluid delivery systems, and also looking at new fungicide products available for Rhizoctonia management.
In the field
Trials were conducted at Streaky Bay on grey calcareous soil, and at Warramboo, which has red sand soils. Both sites have alkaline pH, reasonable soil phosphorus levels and Rhizoctonia as a major disease issue.
The trial investigated different nutrient delivery. DAP or 18:20 was used as the standard treatment to compare different phosphorous sources and different trace element sources. Two fungicides for Rhizoctonia management were also used to see if they increase crop production and crop growth, and ultimately crop yield for growers.