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Bread from Stones: A New and Rational System of Land Fertilization and Physical Regeneration (Classic Reprint) - Hardcover

Hensel, Julius

 
9781528276283: Bread from Stones: A New and Rational System of Land Fertilization and Physical Regeneration (Classic Reprint)

Inhaltsangabe

Excerpt from Bread From Stones: A New and Rational System of Land Fertilization and Physical Regeneration

As there was found a considerable quan tity of phosphoric acid and of potash in the ashes of all seeds, and as these do not exist in the air and must therefore be furnished by the soil, it was very natural that the in quiry was started, how much of these sub stances necessary for the raising of plants is still at hand in the soil?

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