Hidrogênio, carbono, nitrogênio e enxofre em Steiner (2007)

From what I have said hitherto, we must provide for those things of the Universe which are above all important — namely, carbon, hydrogen, nitrogen and sulphur — to come together in the right way with other substances in the organic realm; notably with potash salts, for instance. As to the mere quantity of potash salts which the plant needs for its growth, no doubt a little of these things is already known. It is well-known that potash-salts (or potash, generally speaking) carry the growth rather into those regions of the plant organism which become rigid structure or framework in many instances, i.e. which bring about the formation of trunk or stem or the like. The potash-content will hold back the growth in forming strong and sturdy stems, etc. But it is very important — in all that takes place as between the earth and the plant — so to assimilate the potash content that it relates itself rightly, within the organic process, to that which really constitutes the body of the plant, i.e. to the protein substance. Here we shall be successful if we proceed as follows: (Steiner 2007:44)

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