- Biological Nitrogen Fixation
From the University of Florida.
http://edis.ifas.ufl.edu/scripts/htmlgen.exe?DOCUMENT_SS180
(Added: Wed Jun 12 2002)
- Essential Elements for Plant Growth
This site describes the role of the 16 elements essential for plant growth. A large number of linked pages at the web site provide more in-depth information.
http://www.soils.wisc.edu/~barak/soilscience326/essentl.htm
(Added: Sun Jul 15 2001)
- Liebig’s Law of the Minimum
A description of the history behind Leibig’s law.
http://www.soils.wisc.edu/~barak/soilscience326/lawofmin.htm
(Added: Sat Dec 01 2001)
- Plant Nutrients
More information on essential elements.
http://www.agr.state.nc.us/cyber/kidswrld/plant/nutrient.htm
(Added: Wed Jun 12 2002)
- Something To Grow On
Information on fertilizers.
http://www.cals.cornell.edu/dept/flori/growon/macronut.html
(Added: Wed Jun 12 2002)
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