Bibliography:

Here are some helpful websites that can inform you about information on the following topics previously viewed. The websites are listed below on clay , potassium ,soil texture procedure , soil core extracters , testing for potassium in soil  , soil , and two component sensory transduction systems:

Soil core extracters and more extraction tools:

  http://www.soilmoisture.com/PDF%20Files/sse.pdf  SOILMOISTURE EQUIPMENT CORP.

Background on soil:

http://www.eoearth.org/article/Soil   Michael Pidwirny  2010

Background on potassium:

http://www.newworldencyclopedia.org/entry/Potassium New World Encyclopedia 2008 

Background on clay:

http://www.eoearth.org/article/Clay?topic=49466  Mineral Information Institute 2008

Information on testing for potassium in soil:

http://chemtech.org/cn/scit1305/Soil%20Test%20Laboratory%20Manual.pdf Richard Wheet LaMotte Corporation Soil Test Kit 2004

Information on soil texture procedure:

http://chemtech.org/cn/scit1305/Soil%20Test%20Laboratory%20Manual.pdf Richard Wheet LaMotte Corporation Soil Test Kit 2004

Two component sensory transduction systems :

https://www.bio.cmu.edu/courses/03441/TermPapers/99TermPapers/TwoCom/osmolarity.html

Colin Crossman , Michelle Griffith , Brian Parkison and Annette Woods