Growers convened in Goomboorian, Australia, aiming to foster healthier soil for more resilient crops. Through Growcom's grower-led learning series, participants engaged in practical soil health assessments, focusing on microbial activity, macro-biology, soil structure, texture, and pH. Agronomist Liam Riedy of Metagen shared comparative soil analysis results, utilizing advanced sequencing on samples from persimmon, macadamia, and Brussels sprouts farms. The analysis indicated variations in beneficial microbial activity, pest suppression, and ecological maturity among the samples.
The macadamia sample recorded the lowest beneficial microbes, key for root development, immunity, and nutrient uptake, but had the highest pest suppression levels. Ian Graham's Brussels sprouts farm showed the healthiest soil, excelling in nutrient cycling, ecological maturity, resilience, and pest suppression.
Ian attributes the success to soil management, stating, "To reduce pathogen loads and minimise disease, we give our fields at least three years of rest." He noted, "Until very recently, we also applied eight to twelve tonnes of compost per hectare every year." He further explained, "In addition to cover cropping, rest, and compost, we constantly monitor nutrient levels and adjust our nutrient budget accordingly. We apply what the plant needs."
Michelle Haase, Hort360 GBR Officer, called these practices a "textbook example of best management practice where soil health and water quality outcomes align." In another session, soil scientist Dr. Gareth Glasspool from Agri Technovation guided growers on assessing soil pH, structure, and texture on their farms.
A major takeaway was the role of cover crops, compost, and microbes in improving biodiversity, nutrient cycling, and soil structure across crops. It was noted that reduced soil disturbance benefits soil health, with no-till practices and permanent ground cover preserving microbial life and soil carbon. Strategies like reducing tillage and increasing species diversity in interrow cover were highlighted as beneficial.
Understanding and monitoring soil pH was underscored as critical, as inappropriate pH levels can lock nutrients, affecting plant availability and crop performance. The event emphasized the value of community-driven knowledge sharing and practical tools for achieving long-term soil health and productivity.
For more information:
Queensland Fruit & Vegetable Growers
Tel: +61 (0) 7 3620 3844
Email: [email protected]
www.growcom.com.au
