Full TGIF Record # 136326
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Publication Type:
i
Professional
Content Type:Q & A
Corporate Author(s):USGA Green Section
Title:[Nitrogen soil tests]
Section:Questions and answers
Other records with the "Questions and answers" Section
Source:USGA Journal and Turf Management. Vol. 7, No. 7, February 1955, p. 30.
Publishing Information:New York: United States Golf Association
# of Pages:1
Question:"I've been told that the test for nitrogen is of no real value. Is this true and, if so, why?"
Answer/Response:"The tests for nitrogen are of questionable value. This does not come from the difficulty in measuring the amount of available nitrogen present, but from the fact that the soil will change from day to day. Much of the nitrogen in the soil is contained in an organic form, or in a form not available to plants. Nitrification proceeds in the soil as a result of bacterial activity and therefore more nitrogen is becoming available all the time. Ordinarily plants will use this nitrogen as it becomes available or it will leach out of the soil. If you sample the soil on any given day you might find a relatively small amount of available nitrogen present. However, if you took a sample of that soil and stored it for two days you may find considerably more nitrogen present. If the soil were stored in a can for a week in a warm place where nitrification could proceed, you would find much more nitrogen in the soil. Therefore, the figures for available nitrogen do not give a real indication of the nitrogen present and it is quite easy to see when turf is in need of nitrogen. It will be pale green in color and will grow rather slowly when nitrogen is low. On the other hand, when sufficient nitrogen is present, it will grow rapidly enough to require frequent clipping and the color will be good."
Keywords:TIC Keywords: Soil testing; Nitrogen; Soil test values; Nitrogen level; Nitrogen deficiency
Language:English
References:0
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
USGA Green Section. 1955. [Nitrogen soil tests]. USGA J. Turf Manage. 7(7):p. 30.
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Web URL(s):
https://gsrpdf.lib.msu.edu/?file=/1950s/1955/550229.pdf#page=2
    Last checked: 01/24/2017
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 433.15 .U84
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