Illinois Soil N Test
Lack of relationship between relative corn yield when not fertilized and the ISNT value for 43 on-farm trials in Iowa (data from J. E. Sawyer).
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Illinois Soil N Test
[1]
Source URL:
http://www.ipm.iastate.edu/ipm/icm//ipm/icm/node/219
Links:
[1] http://www.ipm.iastate.edu/ipm/icm/2005/10-10/ntest.html
