| Building Fertile Soil - Guide to creating and maintaining good quality soil.
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| Soil - Gardening and in particular, soil information from the Oregon State University.
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| Soil and Fertilizers - Publications about fertilizing a number of different plants, from the North Dakota State University.
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| Soil Management - A number of publications (in PDF format) dealing with topics about soil.
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| Soil Resource Management - References about the fertility, compaction, testing and conservation of soil. Published by the University of Nebraska.
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| Improving Soil - Instructions for improving soil. Includes soil components, soil testing and soil amendments.
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| Better Homes and Gardens: Soil, Water & Fertilizers - Includes articles on making potting mixes, proper watering techniques, nutrient needs, and mulching.
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| Understanding the Soil Processes - Information about soil composition and the biological processes occurring within the soil.
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| About Compost - Describes composting as natural recycling, which occurs on a continuous basis in the natural environment.
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| Foster's Sustainable Organic Soil Program - Resources to learn the importance of using natural products to take care of the soil ecosystem.
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| Iron Chlorosis - Explains how to detect and combat iron deficiency in plants.
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| Lead Contamination In The Garden, HYG-1149-93 - Ohio State University
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| Micronutrient Disorders, HYG-1252-98 - On the deficiencies that may occur in soilless floriculture, and how these can be remedied.
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| Physical Characteristics of Growing Mixes, HYG-1251-97 - From Ohio State U.
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| Soil Testing is an Excellent Investment for Garden Plants and Commercial Crops, HYG-1132-99 - Ohio State University
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| Guidelines for Choosing a Soil-Testing Laboratory, HYG-1133-99 - Ohio State University
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| Improving Soils For Vegetable Gardening, HYG-1602-92 - Ohio State University
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| Fertilizing Vegetable Garden Soils, HYG-1601-92 - Ohio State University
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| World of Soil - An introduction to understanding the basic components of soil.
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