ماده آلی

موجودات زنده از ترکیبات آلی تشکیل شده‌اند. آن‌ها در طیِ زندگی به ترشح یا دفع مواد آلی (همچون برگ و ریشه) در محیط زیستِ خود می‌پردازند و پس از مرگ، بدنهٔ آن‌ها با عمل باکتریایی و قارچی به ترکیباتِ ساده‌تر شکسته می‌شود. مواد آلیِ طبیعی می‌تواند تا حد زیادی متفاوت باشد. "

• زیست‌توده
• گیاخاک
• بافت (زیست‌شناسی)
• زیست‌مولکول
• کشاورزی آلی
• ترکیب آلی

• Aiken, George. United States of America. United States Geological Survey. Organic Matter in Ground Water. 2002. 1 May 2007 <http://water.usgs.gov/ogw/pubs/ofr0289/ga_organic.htm>.
• Cabaniss, Steve, Greg Madey, Patricia Maurice, Yingping Zhou, Laura Leff, Ola Olapade, Bob Wetzel, Jerry Leenheer, and Bob Wershaw, comps. Stochastic Synthesis of Natural Organic Matter. UNM, ND, KSU, UNC, USGS. 22 Apr. 2007.
• Cho, Min, Hyenmi Chung, and Jeyong Yoon. "Disinfection of Water Containing Natural Organic Matter by Using Ozone-Initiated Radical Reactions." Abstract. Applied and Environmental Microbiology Vol. 69 No.4 (2003): 2284-2291.
• Fortner, John D. , Joseph B. Hughes, Jae-Hong Kim, and Hoon Hyung. "Natural Organic Matter Stabilizes Carbon Nanotubes in the Aqueous Phase." Abstract. Environmental Science & Technology Vol. 41 No. 1 (2007): 179-184.
• "Researchers Study Role of Natural Organic Matter in Environment." Science Daily 20 Dec. 2006. 22 Apr. 2007 <http://www.sciencedaily.com/releases/2006/12/061211221222.htm>.
• Senesi, Nicola, Baoshan Xing, and P.m. Huang. Biophysico-Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems. New York: IUPAC, 2006.
• "Table 1: Surface Area, Volume, and Average Depth of Oceans and Seas." Encyclopædia Britannica.
• "Topic Snapshot: Natural Organic Material." American Water Works Association Research Foundation. 2007. 22 Apr. 2007 <https://web.archive.org/web/20070928102105/http://www.awwarf.org/research/TopicsAndProjects/topicSnapShot.aspx?Topic=Organic>.
• United States of America. United States Geological Survey. Earth's Water Distribution. 10 May 2007. <http://ga.water.usgs.gov/edu/waterdistribution.html بایگانی‌شده در ۲۹ ژوئن ۲۰۱۲ توسط Wayback Machine>
• Water Sheds: Organic Matter. North Carolina State University. 1 May 2007 <https://web.archive.org/web/20140314222202/http://www.water.ncsu.edu/watershedss/info/norganics.html>.