Effect of Soil Potassium, Potassium Fertilizer and Method of Fertilizer Placement upon Corn Yields1
- W. L. Parks and
- W. M. Walker2
A quadratic regression model including selected linear interactions was fitted to yields of corn (Zea mays L.) grown on a Hartsells loam having varying K soil test levels and K fertilizer applications in the row and broadcast. Inclusion of 3 years of observation in the analysis produced no interaction of year and the parameters for K soil test level or K fertilizer application. There were significant single factor and interaction effects on corn yields due to soil test K levels and K fertilizer applied broadcast or in the row. The corn yield prediction equation illustrates the effect of row or broadcast K upon corn yield at different K soil test levels.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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