Full TGIF Record # 112568
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/00103629709369906
    Last checked: 10/15/2015
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Publication Type:
i
Report
Author(s):Paramasivam, S.; Alva, A. K.
Author Affiliation:University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, Lake Alfred, Florida
Title:Leaching of nitrogen forms from controlled-release nitrogen fertilizers
Source:Communications in Soil Science and Plant Analysis. Vol. 28, No. 17/18, October 1997, p. 1663-1674.
# of Pages:12
Publishing Information:New York, NY: Marcel Dekker
Keywords:TIC Keywords: Nitrogen fertilizers; Leaching; Controlled release fertilizers; Nitrates; Urea; Leachates; Ammonium nitrate
Abstract/Contents:"Application of soluble forms of nitrogen (N) fertilizers to sandy soils may cause leaching of nitrate N (NO3-N) resulting in contamination of groundwater. The leaching loss of N may be reduced to a certain extent by the use of controlled-release N formulations. A leaching column study was conducted to evaluate the leaching of urea, ammonium N (NH4-N) and NO3-N forms from selected urea-based controlled-release formulations (Meister, Osmocote, and Poly-S) and uncoated urea under eight cycles of intermittent leaching and dry conditions. Following leaching of 1,760 mL of water (equivalent ot 40 cm of rainfall) through the soil columns, the recovery of total N (sum of all forms) in the leachate accounted for 28, 12, 6, or 5% of the total N applied as urea, Poly-S, Meister, and Osmocote, respectively. Loss of urea-N from all fertilizer sources was pronounced during the initial leaching events (with the exception of Meister). Cumulative leaching of urea-N was 10% for uncoated urea while <1.7% for the controlled-release formulations. Cumulative leaching of NH4-N was 6.2% for the uncoated urea while <0.5% for the controlled-release formulations. Cumulative leaching loss of NO3-N was 3.78% for Osmocote, 4.6% for Meister, 10.4% for urea, and 10.5% for Poly-S. This study demonstrates a significant reduction in leaching of N forms from controlled-release formulations as compared to that from the soluble form."
Language:English
References:34
Note:Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Paramasivam, S., and A. K. Alva. 1997. Leaching of nitrogen forms from controlled-release nitrogen fertilizers. Commun. Soil. Sci. Plant Anal. 28(17/18):p. 1663-1674.
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http://www.tandfonline.com/doi/pdf/10.1080/00103629709369906
    Last checked: 10/15/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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