Biodynamic Agriculture

An icebreaker

In 1924, worried farmers asked a philosopher for help with failing soil. He gave eight lectures proposing cosmic forces and buried-horn preparations; a century later, the movement's soil often measures well, though the cosmic part stays untested.

Ask one of these · tap to take it

Would you try a farming method you couldn't explain?
Does a practice need its theory to be true to work?
What convinces you a soil is actually healthier?
Should old traditions get tested by today's science?

copy the questions

Worth knowing · 1 of 5

What actually happened at the original lectures?

In June 1924, at a Silesian estate, a philosopher gave farmers eight lectures answering their worry about declining seed fertility and soil vitality. Those talks became the founding text of what farmers there started calling biodynamic agriculture.

Worth knowing · 2 of 5

What is the horn manure preparation, practically?

Cow manure is packed into a cow horn, buried in fertile soil over winter, then dug up and stirred into water before being sprayed thinly across fields. Practitioners hold it as concentrating living, formative forces in the soil.

Worth knowing · 3 of 5

Does biodynamic soil actually test differently?

Some field studies do find biodynamic plots with richer microbial life and better soil structure than conventional ones, similar to well-run organic farms generally. Whether the specific preparations cause that, beyond good organic practice, remains unsettled.

Worth knowing · 4 of 5

What does the certification behind the label mean?

A trademark introduced in 1928 set the first standard for this kind of farming, now run by an international federation. It certifies that a farm follows the method, not that its cosmic claims have been proven.

Worth knowing · 5 of 5

How do scientists who've tested the preparations respond?

Researchers who have run controlled trials generally find no repeatable yield advantage from the preparations themselves over standard compost. They describe the underlying cosmic explanation as outside what current science can test or confirm.

Words to know

Biodynamic agricultureA farming method combining organic practice with preparations and a planting calendar meant to work with cosmic forces.

Horn manure (Preparation 500)Cow manure buried in a cow horn over winter, then sprayed on fields as a soil treatment.

DemeterThe certification mark, introduced in 1928, for farms following the biodynamic standard.

More words

Formative forcesA term from the founding lectures for the unseen influences practitioners hold as shaping living growth.

A voice · 1 of 3

Rudolf Steiner · Philosopher who gave the founding lectures

In his 1924 agriculture lectures, he proposed that cosmic and formative forces, concentrated through specific preparations like buried horn manure, could restore vitality to farmland he was told was failing.

A voice · 2 of 3

Ehrenfried Pfeiffer · Chemist who worked to test the preparations

A student of Steiner's who took up laboratory research after his death, he cultured bacteria from the horn manure preparation and tried to give the method a measurable, scientific footing.

A voice · 3 of 3

Linda Chalker-Scott · Horticulturist who reviewed the science

In a literature review of the preparations, she found no repeatable evidence that they improve soil or plant quality beyond ordinary organic practice, and described the underlying theory as unscientific.

A line to leave them with

The soil often checks out. The cosmic part still can't be checked.