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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/89/3/AJ0890030491
Last checked: 12/14/2016
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| Publication Type:
| Refereed |
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| Author(s): | Carrow, Robert N. |
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| Author Affiliation: | Crop and Soil Science Department, Georgia Exp. Stn. Univ. of Georgia, Griffin, GA 30223-1797 |
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| Title: | Turfgrass response to slow-release nitrogen fertilizers |
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| Section: | Crops
Other records with the "Crops" Section
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| Source: | Agronomy Journal. Vol. 89, No. 3, May/June 1997, p. 491-496. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Slow-release fertilizers; Organic fertilizers; Sulfur-coated urea; Resin-coated fertilizers; Nitrogen; Polymers; Urea; Cynodon dactylon; Fertilization
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| Cultivar Names: | Tifway |
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| Abstract/Contents: | "New polymer coatings have been developed and used to coat sulfur-coated urea (SCU) and other core N materials. These polymer-coated S-coated ureas (PCSCU) and polymer-coated S-coated N-P-K fertilizers (PCSCF) require evaluation for their N-release properties in turfgrass culture. Also, N carriers from three different classes of N sources were included: polymer-coated urea (PCU), ureaformaldehyde (UF) reaction products, and natural organics. Initial and longterm N release were determined as demonstrated by visual quality, total shoot growth, and number of mowings of 'Tifway' hybrid bermudagrass [Cynodon dactylon (L.) Pers. Ć C. transavaalensis Burtt-Davey] grown on an Appling sandy clay loam (clayey, kaolinitic, thermic Typic Kanhapludults). All N carriers were compared within their N class and across all carriers, using urea applied at 98 kg N haā»Ā¹ in early summer of 1994 and 1995 as the base of comparison. Other fertilizers were also applied at this rate and timing, except for three urea-UF reaction products applied in equal, split treatments in early and mid summer. At 0 to 30 d of treatment, PCSCU and PCSCF product performance varied, with 14 to 57% or visual quality ratings equal to or greater than (ā„) urea plots; at 61 to 95 d, 14 to 57% of ratings were > urea ratings. Greater long-term quality response was related to higher S and/or polymer content in the coating of PCSCU and PCUs products, but not to larger particle size for PCSCUs. For PCUs, the 0- to 30-d visual quality response ranged from 14 to 43% of ratings ā„ urea, and at 61 to 95 d from 29 to 71% of ratings > urea. Natural organics and UF reaction products also demonstrated wide variation within their class of initial and long-term N release. Within each N class, the wide diversity of N-release patterns indicates the need to evaluate each carrier, and shows that placement of a specific N source within an N class provides only very broad implications as to its performance." |
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| Language: | English |
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| References: | 9 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Carrow, R. N. 1997. Turfgrass response to slow-release nitrogen fertilizers. Agron. J. 89(3):p. 491-496. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/89/3/AJ0890030491
Last checked: 12/14/2016
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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