Yield of corn as affected by potassium on a coastal plain soil

Abstract

Abstract Corn (Zea mays L.) yields were determined over a four year period on Kalmia sandy loam soil at Georgetown, Delaware. Yields were not significantly increased by the application of K fertilizer. Potassium soil test level was not significantly correlated with corn yield. Multiple extraction and leaching and changes in soil test K indicated that this soil has a K equilibrium which is reestablished sufficiently rapid to supply K to a growing corn crop. Key words: K concentrationK equilibria Notes Published with the approval of the Director of the Delaware Agricultural Experiment Station as Miscellaneous Paper No.725. Contribution No. 53 of the Department of Plant Science, University of Delaware, Newark, Delaware 19711. Supported in part by Agway Inc. Syracuse, NY. Assistant Professor, Department of Plant Science Assistant Professor, Department of Plant Science Professor, Department of Plant Science.