6 Functional Group Guide for Soil - http://www.bbclabs.com/english/sixfg_soil_guide.html
Microbiological components of a soil bioassay. |
Colorado PlanTalk: Iron Chlorosis - http://www.ext.colostate.edu/PTLK/2115.html
Explains how iron deficiency affects trees and plants, with links to more detailed information. |
Do It Yourself.com: Fertilizer, Compost, and Soil - http://www.doityourself.com/scat/fertilizercompostsoi
Series of projects, articles, and tips on fertilizing, composting, and nutrient management. |
Gardening Information: Soil - http://extension.oregonstate.edu/news/category_search.php?searchCat=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 - http://www.improve-your-garden-soil.com/
Covers a wide range of garden soil topics, including soil types, pH, nutrients, testing, composting and fertilizers. |
Improving Soil - http://www.rodsgarden.50megs.com/improvingsoil.htm
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. |
Soil Testing is an Excellent Investment for Garden Plants and Commercial Crops, HYG-1132-99 - http://ohioline.osu.edu/hyg-fact/1000/1132.html
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 - http://www.schundler.com/hort.htm
Collection of articles and resources about the horticultural uses of perlite and vermiculite. |
The World of Soil - http://soil.hostweb.org.uk/
An introduction to soil components, acidity, fertility, and care, as well as a collection of links to other soil resources. |
Vermiculite.com - http://www.vermiculite.com
One-page site giving suggestions on where to purchase vermiculite in the United States, along with some uses and properties of vermiculite. |