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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/68/1/AJ0680010103
Last checked: 12/09/2016
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| Publication Type:
| Refereed |
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| Author(s): | Hughes, T. D. |
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| Author Affiliation: | Assistant Professor of Turf Management, Department of Horticulture, University of Illinois, Urbana, Illinois |
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| Title: | Nitrogen release from isobutylidene diurea: Soil pH and fertilizer particle size effects |
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| Source: | Agronomy Journal. Vol. 68, No. 1, January/February 1976, p. 103-106. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Urea Hydrolysis; Soil pH; Fertilization rates; Application frequency; Slow-release fertilizers; Nitrification; Nitrogen; IBDU; Fertilizers
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| Abstract/Contents: | "Soil-isobutylidene diurea (IBDU) mixtures were incubated to determine the effects of soil pH and IBDU particle size on N release patterns. Such information is needed for predicting rates and frequencies of application. All incubations were conducted at a temperature of 21 ^D+- 0.5C and 28 ^D+- 2% soil moisture. Evidence was obtained for excluding urea-N concentrations from calculations of N recovery, thus all recoveries were based on concentrations of (NH+4 + NO-3)-N. Nitrogen release patterns from 0.7 to 0.8 mm IBDU particles in soil at initial pH's of 5.7, 6.8, and 7.7 were determined. After four weeks of incubation, the amount of N released was equivalent to one-third of the IBDU-N for soil at pH 5.7, however, lesser amounts were released in soil at pH's 6.8 and 7.7. Differences in N release were due to differences in NH+4-N concentrations, whereas concentrations of NO-3-N were not related to soil pH throughout the 10-week incubation period. Thus, N release from IBDU was affected by soil pH shortly after fertilizer application, but this effect disappeared as soon as the NH+4 accumulation was exhausted by nitrifying organisms. Fertilizer particle size had pronounced effects on N release in soil of initial pH's 5.7 and 7.4. Nitrogen recoveries of 75% after 10 weeks, 58% after 21 weeks, and 50% after 32 weeks were obtained for IBDU particle diameters of 0.6 to 0.7 mm, 1.0 to 1.2 mm, and 1.7 to 2.0 mm, respectively." |
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| Language: | English |
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| References: | 6 |
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| See Also: | See also related article "Turfgrass research update" The Agronomist, 13(3) March 1976, p. 7-8, R=218146. R=218146 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hughes, T. D. 1976. Nitrogen release from isobutylidene diurea: Soil pH and fertilizer particle size effects. Agron. J. 68(1):p. 103-106. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/68/1/AJ0680010103
Last checked: 12/09/2016
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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