http://www.units.muohio.edu/dragonfly/itc/one.htmlx
http://www.units.muohio.edu/dragonfly/itc/one.htmlx
http://answers.yahoo.com/question/index?qid=20071209082127AAFYbeM
http://carmiegarden.blogspot.com/2007/05/my-plants-need-water.html
http://www.ncagr.com/cyber/kidswrld/plant/nutrient.htm
http://www.catalogs.com/info/garden-yard/what-does-a-plant-need-to-grow.html
http://www.ncagr.com/cyber/kidswrld/plant/nutrient.htm
http://library.thinkquest.org/3715/Environ.html
http://library.thinkquest.org/3715/
http://www.bbc.co.uk/gardening/htbg/module1/moisture1.shtml
http://en.wikipedia.org/wiki/Root
http://library.thinkquest.org/04oct/00134/stemsx.html
http://www.quazen.com/Science/Biology/Leaves-play-a-very-important-role-in-plants.4089