| 2. | Soil and Fertilizers | | | Publications about fertilizing a number of different plants, from the North Dakota State University. ndsuext.nodak.edu |
| 3. | Improving Soil | | | Instructions for improving soil. Includes soil components, soil testing and soil amendments. www.rodsgarden.50megs.com |
| 4. | Fertilizers | | | Includes articles on making potting mixes, proper watering techniques, nutrient needs, and mulching. www.bhg.com |
| 6. | About Compost | | | Describes composting as natural recycling, which occurs on a continuous basis in the natural environment. www.ecochem.com |
| 8. | Garden Soil | | | Information about the components of good soil. Information on testing and improving garden soil. garden-soil.com |
| 9. | Iron Chlorosis | | | Explains iron chlorosis in trees and plants, and how to correct it. ohioline.osu.edu |
| 17. | World of Soil | | | An introduction to understanding the basic components of soil. soil.hostweb.org.uk |
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