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In page Rudolf Steiner:

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A central aspect of biodynamics is that the farm as a whole is seen as an organism, and therefore should be a largely self-sustaining system, producing its own manure and animal feed. Plant or animal disease is seen as a symptom of problems in the whole organism. Steiner also suggested timing such agricultural activities as sowing, weeding, and harvesting to utilize the influences on plant growth of the moon and planets; and the application of natural materials prepared in specific ways to the soil, compost, and crops, with the intention of engaging non-physical beings and elemental forces.[citation needed] He encouraged his listeners to verify such suggestions empirically, as he had not yet done.[6]