ADAM KEILBACH

Reduce nutrients according to crop age without impacting crop growth.

Who: Adam Keilbach

Location: Mackay

Reduce nutrients according to crop age without impacting crop growth. Adam Keilbach Final Report

Background

Each year a crop is ratooned, its potential yield is reduced due to harvester damage and loss of plant vigour.  After second ratoon, there is a high chance that the yield will be reduced by at least 10 percent. This leads to the belief that from third ratoon the fertiliser rate could be lowered further each year the crop is ratooned.

Because the crop has compromised yield, applying lower rates of nutrients should have no negative impact on crop growth. Better matching fertiliser use to the yield potential can lead to increases in nutrient use efficiency, reduced loses and increased profitability.

This trial will investigate the impact of reducing nutrients on older ratoons.