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If your soil is already dark, crumbly, earthy-smelling and full of worms, or if your plants seem happy and healthy, your soil may not need amendments. But most home gardens could use a little boost, especially for veggies, annuals and new plantings.

If you're not sure about your soil, or have any concerns about pollutants, The University of Massachusetts offers a range of relatively inexpensive quality testing. Contact the Oregon State University Master Gardeners to find out about additional options. Glitter Eye Makeup

Soil amendments | Metro

Compost improves soil structure – increasing drainage in heavy clay and water holding capacity in sandy soil. If not over-applied, it reduces polluted runoff into our rivers and streams. It's also teeming with beneficial organisms that make free fertilizer from air, rocks and decomposing plants. You can make your own compost from yard trimmings and food wastes, or buy it from the nursery. Here are some common ways to build better soil with compost:

Other amendments help supplement compost

But some amendments may not be what they seem

Eggshells are an easy and economical calcium source, and agricultural lime is good, too. These will add calcium, which is an important nutrient, especially for vegetable beds, and they help correct overly acidic soils. Dolomite lime also adds magnesium, another important nutrient.

Ask an Oregon State University Extension Service Master Gardener in person, on the phone or online.

Soil amendments | Metro

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