Comparing different soil amelioration techniques to improve subsoil acidity

This trial is currently in progress

Key Messages

  • This project will compare the incorporation of zero or 2 t/ha of lime sand with deep ripping, one-way plough and spader combinations in a replicated plot trial, measuring their effects on crop production.
  • Trial Rationale
  • Steps Taken
  • Lessons Learnt
  • Looking Forward

Trial Rationale

Water use efficiency is a key driver to optimizing yields and being sustainable in lower rainfall districts. Crops need to be able to access the sub-soil to make full use of the soil moisture available throughout the soil’s profile. Sub-soil constraints are possibly the greatest limiting factor to water use efficiency.

Soil acidification is recognized as a major soil constraint that is threatening both agricultural economic and natural resource throughout the productive agriculture areas of Western Australia. It is one of the few soil constraints that can be treated but questions remain such as:

  • What is the best incorporation method (if at all)?
  • How long will the benefits last and is it economical?

Steps Taken


Lessons Learnt


Looking Forward


Bruce Rock

Project Snapshot

Bruce Rock
NRM Region:
Average Rainfall:
Low - Less than 325mm
Enterprise Mix:
System Constraints:
Acid Soil, Low water holding capacity
Consultant Ag (Technical Advisor), Wheatbelt NRM
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