Biodynamics and science

Is biodynamic agriculture scientific?

The question cannot be answered with a simple yes or no; it calls for a distinction. Biodynamic agriculture combines two levels: a concrete farming system (a closed cycle, compost management, no synthetic inputs, livestock) and a philosophical superstructure drawn from Steiner's spiritual science (cosmic forces, formative forces). The two levels can be tested to very different degrees, and this is where most misunderstandings arise.

What research shows about the system

For the farming system as a whole, there is solid data. The most important evidence is the DOK long-term trial of the Research Institute of Organic Agriculture (FiBL): since 1978, in Therwil, Switzerland, it has compared biodynamic (D), bio-organic (O) and conventional (K) farming on the same field, the most important long-term field trial of its kind worldwide. The biodynamic system comes out best for soil fertility and humus build-up: higher humus levels, markedly greater activity and diversity of soil organisms and a more stable soil structure, at around 85 percent of the conventional yield and with considerably lower inputs. The Darmstadt long-term fertilisation trial also found that preparations and composted manure increase the humus content and biological activity of the soil.

So the idea that a closed cycle with good compost management benefits the soil is not just a conviction; it can be measured.

What research suggests about the preparations

The isolated effect of the individual preparations, which are used in extreme dilution, is harder to pin down. There are indications, but no complete chain of evidence. Literature reviews describe hormone-like substances in horn manure and horn silica and an effect as a microbial "inoculation"; individual trials (such as the classic eosin trial on horn silica) point to effects. Researchers such as Hartmut Spiess describe the effect as "system regulation": balancing, hard to pin to a single measurement, and strongly dependent on site and farm management.

Food quality

Several studies suggest that biodynamically produced food does well on quality: for example higher levels of antioxidants (in one lettuce study, biodynamic came ahead of organic, which came ahead of conventional), better keeping quality and less nitrate. These comparisons mostly concern the system as a whole; cleanly isolating the specific contribution of the preparations remains methodologically difficult.

The charge of esotericism

Critics call biodynamics esoteric because of its anthroposophical basis. That is accurate insofar as central justifications really do come from a spiritual-scientific worldview rather than from empirical research: the "cosmic forces", the role of the cow horn and the stag's bladder, the effects of the zodiac cannot be derived from natural science. Conversely, it would be dishonest to conclude that the whole system has no effect: the benefits of the system for soil fertility and humus are proven.

An honest approach therefore separates what can be proven from what is a matter of worldview, instead of condemning or glorifying across the board.