I was wondering if you could provide me with a more or less exhaustive list of organic fertilizers and soil amendments, their nutrient profile, and what they are good for, etc.
When you say ‘organic’ fertilizer and soil amendments, do you mean those
items which are allowed under current organic regulations? I ask because
there is considerable difference of opinion over what is meant by the
word ‘organic’ in this context. Sewage sludge which contains heavy
metals could be said to be organically derived, but might not pass muster
in an organic garden, for example.
If you mean products which are on the Organic Materials Review Institute
list of permitted soil amendments, here is a link to their lists.
If you need a truly exhaustive list, I recommend looking at some of the
books available in the Miller Library on this subject. Rodale’s Illustrated Encyclopedia of Gardening and Landscaping Techniques edited by Barbara Ellis (Rodale, 1990) has a very easy-to-use (but probably not exhaustive) guide to soil amendments and fertilizers. Below are are some other titles:
Soils : the right way to use fertilizers, composts, soil conditioners,
soil testing/problem soils 1986
Let nature do the growing : the fertilizer-free vegetable garden / by
Gajin Tokuno c1986
Fertilizers and soil amendments / Roy H. Follett, Larry S. Murphy, Roy
L. Donahue
Fertility without fertilizers : a basic approach to organic gardening /
Lawrence D. Hills
Feeding plants the organic way / Jim Hay
Growing green: animal-free organic techniques / Jenny Hall and Iain
Tollhurst
The following links may be helpful to you:
Colorado State University Extension – Organic Fertilizers
National Sustainable Agriculture Information Service – Sources of Organic
Fertilizers and Amendments
University of California Santa Cruz Agroecology Program – Building Fertile Soil
Washington State University Extension – A Home Gardener’s Guide to Soils and Fertilizers
Oregon State University – Improving Garden Soils with Organic Matter