Which soil components have a negative charge that attract positively charged mineral ions in soil water?

Name: Which soil components have a negative charge that attract positively charged mineral ions in soil water?
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Question

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Clay and humus both have negatively charged sites on their surfaces, which attract positively charged mineral ions in the soil water. Sand and silt do not have this negative charge on their surfaces, so they do not attract mineral ions.

Which Soil Components Have a Negative Charge That Attract Positively