| • | A Summary Guide For The Microbiological Analysis of Soil and Compost - Informational sheet. |
| • | Better Homes and Gardens: Soil, Water & Fertilizers - Includes articles on making potting mixes, proper watering techniques, nutrient needs, and mulching. |
| • | Building Fertile Soil - Guide to creating and maintaining good quality soil, emphasizing organic materials and composting, from the Center for Agroecology and Sustainable Food Systems. |
| • | Do It Yourself.com: Fertilizer, Compost, and Soil - Series of projects, articles, and tips on fertilizing, composting, and nutrient management. |
| • | 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. |
| • | Improve Your Garden Soil - Covers a wide range of garden soil topics, including soil types, pH, nutrients, testing, composting and fertilizers. |
| • | 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. |
| • | Improving Soils For Vegetable Gardening - Ohio State University fact sheet covers soil basics: types, texture and structure, drainage and moisture, nutrients, pH, and cover crops. |
| • | Iron Chlorosis - Explains how iron deficiency affects trees and plants, and how to correct it. Ohio State University fact sheet. |
| • | Lead Contamination In The Garden - Covers causes and effects of elevated lead levels, recommends both health and soil screening procedures, and provides guidelines for gardening in areas with lead contamination. |
| • | 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. |
| • | The Schundler Company - Collection of articles and resources about the horticultural uses of perlite and vermiculite. |
| • | The World of Soil - An introduction to soil components, acidity, fertility, and care, as well as an extensive collection of links to other soil resources. |
| • | Vermiculite.com - One-page site giving suggestions on where to purchase vermiculite in the United States, along with some uses and properties of vermiculite. |
