Salts are compounds formed when positively charged cations such as sodium (Na⁺), calcium (Ca²⁺), magnesium (Mg²⁺) and potassium (K⁺) combine with negatively ...

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Soil bacteria in ancient lama-bordo fields reveal bacteria capable of fertilizing crops and transforming sustainable rural agriculture.

Since the alfalfa in the rest of the field didn’t show any signs of potassium deficiency, I suggested that the farmer take a composite soil sample from just the high areas, which represented about one ...