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Soil and Additives
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Improve Your Garden Soil - Covers a wide range of garden soil topics, including soil types, pH, nutrients, testing, composting and fertilizers. |
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Gardening Information: Soil - Collection of articles from Oregon State University on various aspects of soil: use of amendments and cover crops, temperature, acidity, moisture, and testing. |
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Improving Soil - Oregon horticulturalist offers information on soil components, pH, testing methods, and nutrients, and means of improving it by using amendments and improving drainage and aeration. |
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The Schundler Company - Collection of articles and resources about the horticultural uses of perlite and vermiculite. |
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Vermiculite.com - One-page site giving suggestions on where to purchase vermiculite in the United States, along with some uses and properties of vermiculite. |
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