Premium
Effect of Soil Potassium, Potassium Fertilizer and Method of Fertilizer Placement upon Corn Yields
Author(s) -
Parks W. L.,
Walker W. M.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300030027x
Subject(s) - loam , fertilizer , agronomy , potassium , mathematics , potash , yield (engineering) , zea mays , soil test , environmental science , soil science , chemistry , soil water , biology , physics , organic chemistry , thermodynamics
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.