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Testing Nitrogen-Phosphorus in soil
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Testing Nitrogen-Phosphorus in soil
My science fair project involves testing soil directly for nitrogen-phosphorus concentrations and salt concentrations. I have been looking into electrode meters, however I am not sure which would work best for my project. What is a good method or device to test concentrations directly in the soil?
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SciB
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Re: Testing Nitrogen-Phosphorus in soil
You can buy inexpensive test kits for nitrogen and phosphorus at Home Depot or online (http://www.lamotte.com/en/education/soil-testing).
When you say that you want to test for 'salt' in the soil do you mean just sodium chloride or all salts? If your school has a pH meter you could try measuring the conductivity of a water extract of your soil:
http://extension.uga.edu/publications/d ... mber=C1019
http://www.fao.org/docrep/r4082e/r4082e08.htm
If there is an agricultural extension service near where you live, you could ask them how you could test soil for salinity.
If you have more questions, let us know.
Sybee
When you say that you want to test for 'salt' in the soil do you mean just sodium chloride or all salts? If your school has a pH meter you could try measuring the conductivity of a water extract of your soil:
http://extension.uga.edu/publications/d ... mber=C1019
http://www.fao.org/docrep/r4082e/r4082e08.htm
If there is an agricultural extension service near where you live, you could ask them how you could test soil for salinity.
If you have more questions, let us know.
Sybee