In whole plants, sodium is scarce and potassium is plentiful.

在绿色植物中，钠的含量较少，而钾的含量相对丰富。

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Macronutrients. The macronutrients essential for plants include carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, magnesium, and sulfur.

大量营养元素对植物来说所必需的大量元素包括碳、氢、氧、氮、磷、钾、镁和硫。

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Purple soil supplied the plants with more phosphorus and potassium nutrition and less nitrogen nutrition.

紫色类土壤提供给烟株吸收利用的磷钾养分较多，而氮养分较少。

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Since the September 11 terrorist attacks, people who live near nuclear plants have been buying potassium iodide pills, which can help protect against cancer from radiation exposure.

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They hired a scientist to come up with a formulation of chemicals that delivered nitrogen, potassium and phosphorus in highly water-soluble form, so that an impatient gardener could give plants an instant shot to the leaves, so to speak.

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