Performance data was collected from the two rootstock evaluation plantings at Lindsay Point, South Australia (SA) planted in 2013 and the Almond Board of Australia’s Experimental Orchard in Loxton, SA planted in 2019. This involved collecting data for yield, flowering time and anchorage. Samples for nutrition and nematode susceptibility have been collected for further lab analysis. Tree size measures were collected by subcontractors Aerobotics and SARDI using commercially available and research technologies to provide comparison of the two approaches.
A third trial site was statistically designed by the University of Adelaide and successfully planted at Tubbo, NSW. This site will be evaluated as per the original two sites comparing the performance of nine rootstocks on heavy clay soil. These rootstocks include Atlas, Viking, Rootpac R, Rootpac 20, Nemaguard, Garnem, Cornerstone, Barrier 1 (Empyrean) and Tetra.
Engagement activities extending project findings to growers included: ABA field walk of the trial site at Lindsay Point in August 2022; the Almond Centre of Excellence Open Day following the 2022 Almond Industry Conference in October 2022; finalization of the rootstock technical document; In-a-Nutshell magazine article.