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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/67/6/AJ0670060838
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Volk, Gaylord M. |
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| Author Affiliation: | Professor, Soil Science Department, University of Florida, Gainesville, Florida |
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| Title: | Spotted response of overseeded ryegrass to sulfur-coated urea |
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| Section: | Notes
Other records with the "Notes" Section
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| Source: | Agronomy Journal. Vol. 67, No. 6, November/December 1975, p. 838-840. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Chlorophyll content; Sulfur-coated urea; Cynodon; Lolium perenne; Thatch; Precipitation runoff; Controlled-release nitrogen; Overseeding
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| Abstract/Contents: | "Sulfur-coated urea (SCU) shows excellent potential as a controlled-release N source for turfgrasses, but highly spotted appearance has always resulted during 3 years of tests in which SCU was used as an early application on winter ryegrass (Lolium perenne L.) overseeded on verticut bermudagrass (Cynodon sp.). Darker green spots 5 to 15 cm in diam constituted 20 to 50% of the surface area, with lighter green grass between the spots. The spots became smaller and the contrast greater as the season progressed. Chlorphyll [Chlorophyll] content determined by methanol extraction of fresh grass was 8.5 mg/g on dry grass basis in representative darker green spots vs. 6.6 mg/g for lighter green interspot areas. Apparently, in the absence of retentive thatch, the large round SCU pellets were readily moved by sprinkler irrigation and rainfall, and concentrated into zones of stability. Poor initial distribution and mower pickup were not determining factors. Where effective thatch is lacking some means of incorporation sufficient to anchor the pellets should be devised." |
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| Language: | English |
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| References: | 2 |
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| Note: | Pictures, b/w
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Volk, G. M. 1975. Spotted response of overseeded ryegrass to sulfur-coated urea. Agron. J. 67(6):p. 838-840. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/67/6/AJ0670060838
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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