283-A Soil Chemistry Primer: How Protons and Electrons Influence Soil Moisture and Fertility

Gardeners know that adding organic material to soil improves its fertility, but to understand the reasons why organic matter is such an effective soil amendment, it's necessary to get down to the molecular level. My guest this week, retired horticulture professor Debbie Flower, is here to offer a soil chemistry primer on cation-exchange capacity and how positive and negative charges in soil affect fertility.

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