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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/76/6/AJ0760060964
Last checked: 12/09/2016
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| Publication Type:
| Refereed |
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| Author(s): | Snyder, G. H.;
Augustin, B. J.;
Davidson, J. M. |
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| Author Affiliation: | Snyder: Professor, Everglades Research and Education Center, Belle Glade, Florida; Augustin: Assistant Professor, Fort Lauderdale Research and Education Center, Fort Lauderdale, Florida; Davidson: Professor, Soil Science Department, University of Florida, Gainesville, Florida |
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| Title: | Moisture sensor-controlled irrigation for reducing N leaching in bermudagrass turf |
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| Source: | Agronomy Journal. Vol. 76, No. 6, November/December 1984, p. 964-969. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Nitrogen fertilization; Nitrogen; Tensiometers; Sulfur-coated urea; Moisture sensors; Cynodon dactylon; Cynodon transvaalensis; Fertilization rates; Quality evaluation; Leaching; Irrigation controllers; Irrigation rates; Evapotranspiration; Percolation; Clipping weight; Color evaluation
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| Abstract/Contents: | "The study was conducted to determine the feasibility of using a tensiometer-controlled irrigation system to reduce N leaching in turfgrass while maintaining acceptable growth. Bermudagrass (Cynodon dactylon X C. transvaalensis) was grown on a sand soil (Pomano fine sand, a siliceous, hyperthermic Typic Psammaquent) during a series of 2-month (bimonthly) cycles. Irrigation was applied either daily (Daily irrigation), or when permitted by tensiometer soil moisture sensors (Sensor irrigation). Nitrogen at the rate of 5 g m-2 month-1 was applied bimonthly as NH4NO3 (AN) or sulfur-coated urea (SCU), or as NH4NO3 through the irrigation system with each irrigation (Fertigation). The effect of these treatments on turfgrass color, clipping weights, and on tissue N content were measured. Nitrogen was determined in soil water samples obtained on a near daily basis from below the rootzone using ceramic cup suction lysimeters. Nitrogen leaching ranged from 56% to less than 1% of that applied, depending on treatment and cycle. The AN source combined with Daily irrigation produced the greatest N losses (22 to 56%), and Fertigation with Sensor irrigation produced the smallest losses (< 1 to 6). Sensor irrigation reduced N leaching from all N sources. For SCU and Fertigation with Sensor irrigation, the peak and average N concentrations were less than 0.9 and 0.3 mmol L-1, respectively, whereas for An these values were as high as 2.8 and 1.0, respectively. The combination of Sensor irrigation and fertilization by Fertigation or SCU produced the least N leaching while maintaining acceptable turfgrass growth and quality." |
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| Language: | English |
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| References: | 16 |
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| See Also: | Other items relating to: LEACH |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Snyder, G. H., B. J. Augustin, and J. M. Davidson. 1984. Moisture sensor-controlled irrigation for reducing N leaching in bermudagrass turf. Agron. J. 76(6):p. 964-969. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/76/6/AJ0760060964
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2212646a |
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