Project Overview
A GRDC update on making soil and crop testing work for your bottom line
Getting the most from your fertiliser dollars starts with understanding what’s actually in your soil and how your crop responds. This GRDC Update Paper explores how soil and plant testing across hundreds of paddocks helped growers and advisers quantify nutrient variability and make more informed decisions about nitrogen (N) and phosphorus (P) fertiliser inputs.
It highlights the value of sampling within production zones, the link between nutrient status and response, and practical lessons from on‑farm trials in southern Australia. Whether you’re sharpening nutrient strategies or just looking to reduce risk and improve profitability, this paper gives evidence‑based insights into how testing can strengthen your fertiliser planning.








