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| | Do It Yourself.com: Fertilizer, Compost, and Soil |
| | Series of projects, articles, and tips on fertilizing, composting, and nutrient management.
http://www.doityourself.com/scat/fertilizercompostsoi - New window - Cached - Archive - |
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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.
http://extension.oregonstate.edu/news/category_search.php?searchCat=soil - New window - Cached - Archive - |
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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.
http://www.rodsgarden.50megs.com/improvingsoil.htm - New window - Cached - Archive - |
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| | The Schundler Company |
| | Collection of articles and resources about the horticultural uses of perlite and vermiculite.
http://www.schundler.com/hort.htm - New window - Cached - Archive - |
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| | Soil Testing is an Excellent Investment for Garden Plants and Commercial Crops, HYG-1132-99 |
| | Ohio State University fact sheet covers the benefits of testing garden soil and provides recommendations for testing frequency, collecting a sample, and submitting to a testing lab.
http://ohioline.osu.edu/hyg-fact/1000/1132.html - New window - Cached - Archive - |
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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.
http://www.vermiculite.com - New window - Cached - Archive - |
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