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Effect of N Source, K Source, and K Rate on Soil Nutrient Levels and the Growth and Elemental Composition of Penncross Creeping Bentgrass, Agrostis palustris Huds. 1
Author(s) -
Waddington D. A.,
Moberg E. L.,
Duich J. M.
Publication year - 1972
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1972.00021962006400050002x
Subject(s) - agrostis , potash , fertilizer , nutrient , potassium , urea , chemistry , poaceae , agronomy , agrostis stolonifera , composition (language) , phosphorus , zoology , biology , linguistics , philosophy , organic chemistry
Relationships between soil nutrients, applied fertilizer, and turfgrass response are important in planning turfgrass fertilizer programs. A 4‐year study was conducted to determine the effects of five N sources (urea, Agrinite, Milorganite, Uramite, and Nitroform), two K sources (KCl and fritted potash), and three K rates (0, 1.2, and 2.4 kg/100 m 2 ) on soil nutrient levels and the growth and elemental composition of Penncross creeping bentgrass ( Agrostis palustris Huds.). Soil test levels, elemental content of clippings, and clipping weights were used to evaluate treatments. Soil P and Mg levels were significantly higher with Milorganite as the N source. KCl applications increased K levels and decreased Mg and Ca slightly, whereas fritted potash increased both K and Ca. Tissue analyses indicated highest N with urea as the N source, lowest N with Agrinite, and highest P with Milorganite. Added K increased K in the clippings and decreased N, Ca, Mg, Mn, and Na. Although K additions decreased some elements in the soil and clippings, the magnitude of these changes was not considered critical under the conditions of these experiments. Significant yield differences due to N source decreased over the years. In general, clipping weights were not influenced consistently by K source or K rate; however, significant increases due to K have increased with time.