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| Web URL(s): | https://listings.lib.msu.edu/iowat/1991.pdf#page=72
Last checked: 01/10/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Agnew, M. L.;
Kassmeyer, S. M. |
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| Author Affiliation: | Associate Professor, Extension Turfgrass Specialist, Horticulture Department; Technical Assistant, Field Research Area, University of Iowa |
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| Title: | The effects of 13 granular Nitrogen fertilizer sources on the growth and quality of 'Park' Kentucky bluegrass |
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| Source: | 1991 Iowa Turfgrass Research Report. July 1991, p. 67-69. |
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| Publishing Information: | Ames, Iowa: Iowa State University |
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| Keywords: | TIC Keywords: Nitrogen; Poa pratensis; Fertilizers
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| Abstract/Contents: | "The purpose of this study was to evaluate the performance of 13 granular nitrogen fertilizer sources. The treatments included urea, ammonium sulfate, sulfur coated urea (CIL), sulfur coated urea (TVA), sulfur-coated urea (Scotts), Blue Chip, IBDU (fine), UFC ammonium sulfate, Nutralene, Scotts 41-0-0, Milorganite, Restore 10-2-6, ISU Experimental (natural organic), and a control with no fertilizer applied. All treatments were applied at 1 lb N/1000 ft2 on May 15, June 15, August 15, and September 15, complete-block design. Individual plot sizes were 4 ft by 10ft. All plots were mowed at a 2 in height with all clippings removed. The plots were irrigated with a minimum of 1.5 in water/growing week when sufficient rains did not occur. In 1990, rainfall was excessive from May through mid August. Data collected included visual quality and clipping yields. Visual quality is based on a scale of 1 to 9; with 9 equal to dark-green turfgrass, 6 equal to minimum quality, and 1 equal to straw-colored turf. Clipping yields were obtained at each mowing by collecting all leaf tissue over 2 in within a 1.75 ft by 10 ft (17.5 ft2) area. Clippings were dried and weights recorded. Visual quality data is included in Table 32. Average quality was determined as the means of all quality ratings less the [than] March 29 and April 20 data. None of the fertilizer sources exhibited an average quality less than 7. Sulfur-coated urea (Scotts), sulfur-coated urea (TVA), and Restore 10-2-6 all had an average quality rating greater than 8. The March 26 and April 20 data reflect spring green-up. Sulfur-coated urea (Scotts), milorganite, and Restore 10-2-6 were the only treatments to provide quality ratings above 6 during the early spring. Clipping yield data is included in Table 33. The methylene ureas (Blue Chip, Nutralene, and Scotts 41-0-0) exhibited the lowest clipping yields, while sulfur-coated urea (Scotts), and Restore 10-2-6 produced the greatest clipping yield. Urea-treated plots had low clipping yields when compared to other fertilizer trials. To calculate the amount of dried clippings that would be removed for 1000 ft2 in mowing, simply divide the total amount of clippings by 8. For example, Restore 10-2-6 produced 52.5 lb of dried plant tissue for 1000 ft2 in one growing season, while Blue Chip produced 25.5 lb of dried plant tissue for 1000 ft2." |
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| Language: | English |
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| References: | 0 |
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| Note: | Article appears as abstract
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Agnew, M. L., and S. M. Kassmeyer. 1991. The effects of 13 granular Nitrogen fertilizer sources on the growth and quality of 'Park' Kentucky bluegrass. Iowa Turfgrass Res. Rep. p. 67-69. |
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| Web URL(s):
https://listings.lib.msu.edu/iowat/1991.pdf#page=72
Last checked: 01/10/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 I55 |
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