Improved sampling methods to better predict nutrient availability and supply for soils in the Western Region

By June 30 2020, a new methodology(s) for collecting soil samples will increase the accuracy of determining plant available nutrients in Western Region soils and result in growers making better fertiliser decisions.

This GRDC investment is to:

• By 30 June 2020, complete a series of field and glasshouse experiments evaluating the accuracy of different soil sampling methodologies to measure plant available nutrients. Measurements should include;

• Spatial and depth accuracy.

• Timing of the collection of samples and its effect on plant availability of nutrients and fertiliser responsiveness.

• Number of samples collected within a paddock to accurately assess plant availability of nutrients.

• By 30 June 2020, a report to GRDC and extended to industry outlining a new soil sampling methodology that improves the detection of plant available nutrients and improves grower decision making.

• By March 2018, and each subsequent year, an Annual Progress Report detailing the key findings of the project for the reporting period.

• By June 2020, a Final Technical Report amalgamating the key findings, new knowledge and conclusions of the project to provide an overall interpretation of the work.