Not to horn in on Bert’s posting day….but I was just sent this link to Iowa State’s compendium of research reports on nontraditional materials. Though this database is targeted towards crop production methods, there may be nuggets of information relevant to home gardens as well. And it includes a product list if you’re not sure what to put into the search box.
Unfortunately, the collection is focused on north central USA, but look at the filter a report or article has to go through to make it onto the site:
Criteria for inclusion of a research report or abstract in the compendium includes: 1) at least two site-years of research, with multiple crops or varieties substituting for a site-year; 2) authors listed; 3) replicated with statistical analysis; 4) reasonably applicable to north central USA crop production; 5) reference source available; and 6) author permission.
It’s a great start to building a credible database on the topic. Let us know if you find relevant gardening information by posting a comment below.