Samadi (kutoka Kiarabu روث, سماد) ni mbolea inayotokana na mabaki ya wanyama waliokufa au mimea ambayo huongeza rutuba kwenye udongo. Farmyard Ni samadi ambayo hutokana na takataka za wanyama wanaofugwa na binadamu. Mboji Ni samadi ambayo hutokana na uozo wa takakataka zitokanazo na mabaki ya wanyama na mimea. Greenyard Ni samadi ambayo hutengenezwa kwa kuzika mimea ya rangi ya kijani kwenye shimo maalum. Wikimedia Commons ina media kuhusu: Samadi Application and environmental risks of livestock manure Manure advice for use in gardens Archived 27 Aprili 2010 at the Wayback Machine. North American Manure Expo Cornell Manure Program County-Level Estimates of Nitrogen and Phosphorus from Animal Manure for the Conterminous United States, 2002 United States Geological Survey Manure Management, Water Quality Information Center, U.S. Department of Agriculture Archived 6 Septemba 2015 at the Wayback Machine. Livestock and Poultry Environmental Learning Center Archived 27 Desemba 2010 at the Wayback Machine., an eXtension community of practice about animal manure management Antibiotics and Hormones in Animal Manure (Webcast) Archived 3 Aprili 2010 at the Wayback Machine.: A two part webcast series about the science available on potential risks and best management practices related to antibiotics and hormones from animal manure