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Effect of Soil Potassium, Potassium Fertilizer, and Method of Placement Upon Lodging in Corn (Zea mays L.)
Author(s) -
Walker W. M.,
Parks W. L.
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/sssaj1969.03615995003300060032x
Subject(s) - loam , fertilizer , agronomy , potassium , potash , mathematics , zea mays , soil test , interaction , significant difference , environmental science , chemistry , soil water , soil science , biology , statistics , organic chemistry
A quadratic regression equation including selected linear interactions was fitted to lodging percentages of corn grown on a Hartsells loam with varying K soil test levels and K fertilizer rates applied in the row and broadcast. The study was conducted over a 3‐year period and main effect variables for year, soil test K, and fertilizer K, as well as selected linear interactions, were included in a regression analysis. Both soil and fertilizer K significantly decreased percent lodging, and there was a significant difference in lodging among years. The significant soil K and fertilizer K interaction indicated that the effect of fertilizer K upon lodging varied with soil‐test level. There was also a significant interaction of fertilizer K with year indicating that the effect of K upon lodging varied among years.