{"id":2742,"date":"2019-08-21T00:04:30","date_gmt":"2019-08-21T07:04:30","guid":{"rendered":"https:\/\/depts.washington.edu\/hortlib\/pal\/pal-question-536\/"},"modified":"2023-08-08T12:56:28","modified_gmt":"2023-08-08T19:56:28","slug":"on-organic-fertilizers-and-soil-amendments","status":"publish","type":"pal","link":"https:\/\/depts.washington.edu\/hortlib\/pal\/on-organic-fertilizers-and-soil-amendments\/","title":{"rendered":"on organic fertilizers and soil amendments"},"content":{"rendered":"

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.<\/strong><\/p>\n

 <\/p>\n

When you say ‘organic’ fertilizer and soil amendments, do you mean those
\nitems which are allowed under current organic regulations? I ask because
\nthere is considerable difference of opinion over what is meant by the
\nword ‘organic’ in this context. Sewage sludge which contains heavy
\nmetals could be said to be organically derived, but might not pass muster
\nin an organic garden, for example.<\/p>\n

If you mean products which are on the Organic Materials Review Institute
\nlist of permitted soil amendments, here<\/a> is a link to their lists.<\/p>\n

If you need a truly exhaustive list, I recommend looking at some of the
\nbooks available in the Miller Library on this subject. Rodale’s Illustrated Encyclopedia of Gardening and Landscaping Techniques<\/em> 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:<\/p>\n

Soils : the right way to use fertilizers, composts, soil conditioners,
\nsoil testing\/problem soils<\/em> 1986<\/p>\n

Let nature do the growing : the fertilizer-free vegetable garden \/ by
\nGajin Tokuno<\/em> c1986<\/p>\n

Fertilizers and soil amendments<\/em> \/ Roy H. Follett, Larry S. Murphy, Roy
\nL. Donahue<\/p>\n

Fertility without fertilizers : a basic approach to organic gardening<\/em> \/
\nLawrence D. Hills<\/p>\n

Feeding plants the organic way<\/em> \/ Jim Hay<\/p>\n

Growing green: animal-free organic techniques<\/em> \/ Jenny Hall and Iain
\nTollhurst<\/p>\n

The following links may be helpful to you:<\/p>\n

Colorado State University Extension – Organic Fertilizers<\/a><\/p>\n

National Sustainable Agriculture Information Service – Sources of Organic
\nFertilizers and Amendments<\/a><\/p>\n

University of California Santa Cruz Agroecology Program – Building Fertile Soil<\/a><\/p>\n

Washington State University Extension – A Home Gardener’s Guide to Soils and Fertilizers\u00a0<\/a><\/p>\n

Oregon State University – Improving Garden Soils with Organic Matter<\/a><\/p>\n

Utah State University Extension<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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…<\/p>\n

Continue reading on organic fertilizers and soil amendments<\/span><\/a><\/div>\n","protected":false},"author":4,"featured_media":0,"menu_order":0,"template":"","keyword":[149,281],"class_list":["post-2742","pal","type-pal","status-publish","hentry","keyword-organic-fertilizers","keyword-soil-amendments"],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal\/2742"}],"collection":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal"}],"about":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/types\/pal"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/users\/4"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/media?parent=2742"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/keyword?post=2742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}