| http://www.w3.org/ns/prov#value | - But, elements such as carbon, hydrogen, oxygen, sulfur, magnesium, copper, cobalt, sodium, boron, molybdenum, and zinc are just as important to plant development as N-P-K. Organic gardeners can look to the work of Sir Albert Howard for information on how to grow plants more naturally.?? 2012 Clean Air Gardening - 2266 Monitor Street, Dallas, TX 75207
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