Ferro e chumbo em Steiner (2007)

When walking through the flower gardens at Whitsun, 1924, Dr. Steiner remarked as he looked at the flowers: “They none of them seem to feel quite happy here; there is too much iron in the soil.” When he came to the roses, which were not flowering well, and did not look at all healthy (mildew), Dr. Steiner advised that very finely divided lead be given to the soil. (Steiner 2007:79)

STEINER, Rudolf. 2007. The Agriculture Course. (Trans.: George Adams) Shrewsbury: Wilding & Son Ltd.