The color of your soil offers a lot of information. If it's pale, for example, it's likely very low in nutrients, while if it's reddish, it's high in iron.
What Your Garden's Soil Color Really Means And Why It Matters

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The color of your soil offers a lot of information. If it's pale, for example, it's likely very low in nutrients, while if it's reddish, it's high in iron.