Improve Your Garden Soil -  .

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.

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.

The Schundler Company - - Collection of articles and resources about the horticultural uses of perlite and vermiculite.

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.

A Summary Guide For The Microbiological Analysis of Soil and Compost - - Informational sheet.

Vermiculite.com - - One-page site giving suggestions on where to purchase vermiculite in the United States, along with some uses and properties of 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.