How does a yard replenish mass when grass is constantly being cut and discarded?
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Ignoring pure water content and broken down by weight, roughly 95% of a plant’s mass is contributed by the elements oxygen, carbon, and hydrogen. These are all sourced from groundwater or directly from the air. Plants only take a tiny fraction of their mass from the soil, consisting of trace nutrients like potassium, calcium, phosphorus, magnesium, etc.
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