The Illinois Soil Nitrogen Test: Should it be used in Iowa?
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2005-10-10
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Sawyer, John
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Abstract
The test was developed several years ago at the University of Illinois by researchers in the Department of Natural Resources and Environmental Sciences. It is a laboratory procedure designed to measure N liberated from soil heated for 5 hours with dilute alkali solution (sodium hydroxide). The test does not measure nitrate, but does measure exchangeable ammonium and a fraction of soil organic N.
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Sat Jan 01 00:00:00 UTC 2005