Wheat and Lupin Potassium Responses

Assessment of soil test and K responses for wheat and canola in southern Victoria.


The Better Fertilizer Decisions for Crops Project (BFDC) that concluded in 2012 identified several gaps in data around the development of robust soil test calibrations. This project seeks to collect crop responses to applied potassium particularly from the high rainfall zone of southeastern Australia. Read more

Year of initiation:2013
Year of completion:2014


27 Jan 2014

Do we need to revisit potassium?
Paper presented at the Adelaide GRDC Advisor Update

Interpretive Summary


There is almost no data available on crop responses to applied K in the southern grains region, especially the high rainfall zones where cropping is becoming more intensively practiced. A single field trial experiment was established at Lake Bolac, Victoria in 2013 to investigate the response of wheat and lupins to applied K. The site selected was on a yellow Kurasol near Lake Bolac in western Victoria.


The Better Fertilizer Decisions for Crops project identified gaps in the dataset for wheat and canola responses to K in eastern Australia. This project will support additional soil measurements of selected K fertilizer application rate experiments in southwestern Victoria, undertaken by the New South Wales Department of Primary Industries.

Updates & Reports


2014 Annual Report


2013 Annual Report


Potassium response curves

Project Leader

Mark Conyers, New South Wales Agriculture
Jonathon Holland, New South Wales Agriculture

Project Cooperators

Jon Midwood, Southern Farming Systems

IPNI Staff

R. M. Norton


Oceania \ Australia and New Zealand \ AUS \ Victoria \ Southwest Victoria


4r rate, plant analysis and sampling

lupin, wheat

Potassium (K)