Where’s the proof that spraying a tiny bit of fermented cow poo on your vineyard actually works?
There have been a number of scientific studies comparing biodynamic, organic and conventional agriculture and viticulture. One long-term US trial, for example (reported in the American Journal of Enology and Viticulture), found that while there was little difference between the soil measurements in the vineyards being observed, the biodynamic vines were in better balance and produced riper, darker-coloured red grapes. You can download a copy of a fascinating article about this research here: Taking a Scientific Look at Biodynamics Every single Australian grape grower and winemaker I have spoken to or visited has told me that using the BD methods has made a difference in their vineyard. For example, many growers relate how, when they run their sheep through the vines, the animals will immediately gravitate towards the grass growing in ground sprayed with 500, instinctively knowing it is tastier and more nutritious. Claudia Weersing of Pyramid Valley vineyard in New Zealand tells a story
