A recently published study of  Edita Juknevičienė et al. (2021) shows a positive effect of the two biodynamic preparations horn manure and horn silicate on the growth and fruit quality of giant pumpkin (Cucurbita Maxima).

The abstract as well as the entire study can be read under the following link.

https://chembioagro.springeropen.com/articles/10.1186/s40538-021-00258-z