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The Illinois Soil Nitrogen Test ("ISNT") is a method for measuring the amount of Nitrogen in soil that is available for use by plants as a nutrient. The test predicts whether the addition of nitrogen fertilizer to agricultural land will result in increased crop yields. [1] [2] Nitrogen is essential for plant development.
Any laboratory test (soil or tissue test) performed by a commercial company will cost the grower a fee. Laboratory tests take at least a week to complete, usually 2 weeks. It takes time to dry the samples, send them to the lab, complete the lab-tests, and then return the results to the grower.
A soil test is a laboratory or in-situ analysis to determine the chemical, physical or biological characteristics of a soil. Possibly the most widely conducted soil tests are those performed to estimate the plant-available concentrations of nutrients in order to provide fertilizer recommendations in agriculture.
You may not save much money as some soil test kits can be similarly priced to an extension services lab soil test. Many University extension offices that offer soil testing have prices typically ...
In the late 1930s Truog worked on a test to determine the amount of nitrogen in the soil which would become available in a season to plant life. At the time this question was mostly academic. However, the farmers were putting more thought into what was in the soil and how the plants interacted with it.