NSW Department of Primary Industries run a monthly webinar on soils, through their Soils Network of Knowledge.
Recent webinars have covered topics including storing more carbon in your soil, soil acidity, nitrogen decision making, and alternative fertilisers.
There are more than 35 webinars in the library available to view, with most running for 30 to 60 minutes.
You can also sign up to the NSW DPI Soils mailing list, to receive notifications of upcoming webinars in the series.