Managing micronutrient deficiencies in cropping systems of eastern Australia

This project will address these increasing concerns and speculation in a three pronged approach for all six micronutrients named in the tender (Mn, Zn, Cu, B, Mo, Fe) for all cropping regions in Australia except for those in WA. This project will liaise closely with a separate bid being prepared by Dr Ross Brennan of DAFWA to address issues in WA specifically, should that bid be successful. This project will produce clear guidelines for management of micronutrient disorders for the major crops in the southern and northern regions of GRDC based on existing knowledge which has been objectively tested for its relevance to modern cropping systems and modernised for current technologies and economic circumstances where necessary.


14 Oct 2016

Manganese foliar trial - Wheat Streaky Bay 2014

Streaky Bay, South Australia, 2014

A range of foliar delivery strategies for Mn were evaluated at this site, and these were assessed as responses in terms of shoot dry weights, grain yield, screenings and grain protein concentration. The nutrient concentrations in the YEBs were assessed as well.

Mean site yield was 2.1 t/ha, YEB Mn concentrations are within the range of 18-20 mg/kg, which is above the critical values of 10-12 mg/kg given in Reuter and Robinson.

There were no statistically significant differences due to the treatments.

We were notified of a paddock which was showing signs of Mn deficiency, so decided to place a foliar trial into the paddock during the growing season.

Trial site summary: Plots of 20m x 2m were sprayed with treatments. There were 9 treatments and 4 different product groups (sulphate, EDTA chelate, lignosulphate chelate and an amino acid chelate). 150g Mn/ha low rate was selected to be lower than the lowest quantity of Mn in the label recommended rates.

Table 1: Treatment list for Mn foliar trial in Streaky Bay, SA 2014.