biodynamic preps

is there anything to these preparations that enhance cow manure to improve soil ? i have
used them for 2 years. biodynamics was a term used by Rudolph Steiner in the early
1900s, according to the book "Secrets of the Soil" in areas where the soil is poor,
the land and soil is restored to productivity. Jim

If you have used them for 2 years, have you noticed any difference in your soil?

Not "scientific" but the first year was a surprise in nature's response, the second
year was a long drought , so there was not a good response IMHO , some slow
growing trees did top the one foot a year growth, for zone 3, that is good. jim