#ausmacadamias

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MC15007 Still Wild about Macadamias - conserving a national icon (Final Report)

2019 | Gould L | Research report/article

A final report on project (MC15007), Still Wild about Macadamias - conserving a national icon, has just been released. The report details the successful completion of the project, whose objectives were to: • improve understanding and management of the threats to wild macadamia trees • promote and drive the protection and conservation of threatened wild populations • help protect other rainforest flora and fauna, including several threatened species and ecosystems.

Understanding macadamia water transpiration: 2019 Tree water relations course presentation, Theunis Smit (Bundaberg)

2019 | Australian Macadamia Society | Video

Presentation on 'Understanding macadamia water transpiration' by acclaimed water relations researcher Theunis Smit. This presentation was part of the 2019 AMS Tree Water Relations courses that examined the essential role of water management in macadamia in both dryland and irrigated orchards.

Understanding macadamia water transpiration: 2019 Tree water relations course presentation, Theunis Smit (Yamba)

2019 | Australian Macadamia Society | Video

Presentation on 'Understanding macadamia water transpiration' by acclaimed water relations researcher Theunis Smit. This presentation was part of the 2019 AMS Tree Water Relations courses that examined the essential role of water management in macadamia in both dryland and irrigated orchards.

Macadamia pollination: What to do? (2018 MacGroup)

2018 | Howlett B, Evans L | Presentation

Powerpoint presentation details the latest research on macadamia pollination

MC13014 Advancing the timing of first commercial harvest using trunk girdling

2018 | Thorp G, Smith A | Research report/article

A research project was designed to assess the trunk girdling as a way of producing more crop on young trees (MC13014, Macadamia propagation and precocity). The research tested the effect of trunk girdling on 3- and 4-year-old trees in an orchard near Knockrow in the Northern Rivers, with promising results.

MC13009 TNSC - an unfolding story

2017 | Vimpany I, Bryen L | Research report/article

Summary of the results of a 3-year project to assess the potential for and benefits of measuring total non-structural carbohydrate (TNSC) in macadamias as a way of improving crop yields.

Unlocking the secrets to high orchard productivity - the Small Tree High Productivity Initiative

2017 | Queensland Agriculture | Video

The Small Tree High Productivity Initiative involves a team of 35 scientists, working towards transforming the efficiency and productivity of avocado, macadamia and mango orchards.

MC13009 Total non-structural carbohydrate testing in macadamias (Final)

2017 | Vimpany I | Research report/article

Trees in orchards in Bundaberg and Northern Rivers were sequential samples for levels of total nonstructural carbohydrate in an attempt to explain cropping behaviour.

MC13009 Total Non-Structural Carbohydrate Testing in Macadamias

2016 | Vimpany I | Research report/article

An earlier project (Stephenson et al, 1987) showed that total non-structural carbohydrate (TNSC) increased steeply from nut maturity in late February until flowering and then declined steeply until nuts were mature. This indicated that the tree stored spare carbohydrate during certain times of the crop cycle and used these reserves when demand exceeded supply from photosynthesis. This project investigated the seasonal pattern of TNSC in Hawaiian and Australian macadamia cultivars in Bundaberg and Northern NSW.

MC07021 Towards a functional-structural model for macadamia

2013 | Stephenson R | Research report/article

Development of a functional-structural modelling for macadamia. The project used self-organising model to explore canopy management options. The amount of light available for growth was sensed at the leaf level and used to represent vigour, which was then accumulated acropetally. Buds also sensed the light environment but only to provide demand in subsequent redistribution. Glasshouse experiments assessed the architecture of small macadamia plants from more than 15 ecotypes of five genotypes. A sonic digitiser was used to digitise the small macadamia plants in pots over the time. Detailed information was extracted and their architectural pattern of growth was compared. Photosynthesis of three macadamia genotypes was measured. The effect of rootstocks on micro grafted A4 scion was also studied. Orchard experiments were conducted to determine the relationship between vegetative growth and carbohydrate sources in mature macadamia trees in mid-March and mid-September 2011, coinciding with the two major flushes that are normally produced. A prototype model of girdled and non-girdled branches has been developed to show the contribution of current photosynthesis (leaf area) and the stored carbohydrate pool to new shoot growth on girdled and non-girdled branches.

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This website has been partly funded by Hort Innovation, using the macadamia research and development levy and contributions from the Australian Government.