Organic fertilizers, amendments and info links

Some helpful links here for you guys building and amending soils.

-Organic amendments and fertilizers
https://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG42_Soil_Amendments_and_Fertilizers.pdf

-Balanced organic npk sources and info
http://www.grow-it-organically.com/npk-fertilizer.html

-Organic phosphorus sources and info
http://www.grow-it-organically.com/organic-phosphorus-fertilizers.html


-Organic nitrogen sources and info
http://www.grow-it-organically.com/organic-nitrogen-fertilizer.html

-Organic potash sources and info
http://www.grow-it-organically.com/organic-potash-sources.html

-Organic calcium sources and info
http://www.grow-it-organically.com/organic-calcium-sources.html