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Leaching and Mass Balance of 15N‐Labeled Urea Applied to a Kentucky Bluegrass Turf by E. D. Miltner; B. E. Branham; E. A. Paul; P. E. Rieke is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Leaching and Mass Balance of 15N‐Labeled Urea Applied to a Kentucky Bluegrass Turf about?

The fate of urea applied to Kentucky bluegrass (__Poa pratensis__ L.) turf was studied over a 2‐yr period using a combination of intact monolith lysimeters and small plots. Soil type was a Marlette fine sandy loam (fine‐loamy, mixed mesic Glossoboric Hapludalfs). Urea was applied at a rate of 196 kg N ha^−1^ yr^−1^ in five equal applications of 39.2 kg N ha^−1^, using two application schedules. Treatments were fertilized at approximately 38‐d intervals with the “Spring” treatment fertilized from late April through late September and the “Fall” treatment from early June through early November. In 1991 only, the April and November applications used ^15^N‐labeled urea (LFN). For the Spring treatment, 31% of LFN was recovered from thatch at 18 DAT. This value remained constant for the next year, then gradually declined to 20% after 2 yr. Only 8% of the LFN was recovered from soil at 18 DAT and increased to only 20% 2 yr after application. Approximately 35% of the LFN was harvested in clippings over 2 yr. Through May 1993 (748 DAT), LFN in leachate totaled 0.18% of the amount applied. For the Fall treatment, 62% of the LFN was recovered from thatch at 18 DAT. This value declined to 35%

Who reads Leaching and Mass Balance of 15N‐Labeled Urea Applied to a Kentucky Bluegrass Turf?

Author

E. D. Miltner; B. E. Branham; E. A. Paul; P. E. Rieke

Publisher

The American Society of Agronomy; Crop Science Society of America; Wiley (ISSN 0011-183X)

Published

1996

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)