soil current infographic or at AgSource Laboratories we like to call it the CEC Cation Exchange Capacity here is a printable info sheet http://documents.crinet.com/AgSource-Cooperative-Services/Agronomy/F-04263-12---CEC-FS-GENERIC.pdf
electrolux_hand_cleaner5 Sterile Hands Purell and other hand sanitizers do a good job at keeping hands clean, but they do lack the sense of giving a complete hand wash. Some sanitizers leave a sticky sensation in the hands! Offering another portable and eco-friendly solution is the Electrolux HandCleaner Project. It could do with some design refinements, but scores well in the solution-thinking part.
Floating Washing Machine Uses Dry Ice to Clean Clothes in Minutes