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| Web URL(s): | https://listings.lib.msu.edu/iowat/1989.pdf#page=76
Last checked: 01/10/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Moore, R. W.;
Agnew, M. L.;
Christians, N. E. |
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| Title: | Evaluation of Liquid Fertilizer Programs on Three Kentucky Bluegrass Cultivars |
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| Source: | 1989 Iowa Turfgrass Research Report. July 1989, p. 72-77. |
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| Publishing Information: | Ames, Iowa: Iowa State University |
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| Keywords: | TIC Keywords: Fertilizer analysis; Poa pratensis; Thatch control; Liquid fertilizers; Fertilization program; Visual evaluation; Clipping weight; Nitrogen fertilizers; Cultivar evaluation; Urea; Fluf; Application rates; Application timing; Low maintenance
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| Abstract/Contents: | Compares 12 liquid fertilizer programs using four nitrogen (N) sources on three Kentucky bluegrass cultivars. The treatments were started in the spring of 1985 and will continue through 1990. The turf is maintained at a cutting height of 2 in and all clippings are removed. The four fertilizers include Urea, Powder Blue, Fluf, and Formolene. They were applied using different application schedules and three different application rates. Each schedule received a total of 4 lb N/1000 ft2/growing season. The balanced program received 1 lb n/1000 ft2 in each of the months of April, May, August, and September. The heavy spring program received 0.5 lb N in April, 1.5 lb in May, and 1 lb N each in August and September. The late fall program required 0.5 lb N in April, .75 lb in August, 1 lb in September, and 1 lb in November. The three cultivars of Kentucky bluegrass are Majestic (high-maintenance grass), Vantage (medium-maintenance grass), and Park (low-maintenance grass). Each cultivar was replicated three times and each of the 12 fertilizer programs were randomized within each cultivar. The data taken in 1988 include visual quality, clipping weight, thatch depth, and root weights by depth. Treatments were rated for visual quality each month, while clippings were collected, dried and weighed each month on random dates. Thatch depth was taken October 28. Finally, root samples were collected in October 1988. Results with least significant difference values as provided in tables. In comparing cultivars, Majestic had the best visual quality rating and had much better quality from mid-July to fall. Majestic produced one-third to one-half the amount of clippings since it is a prostrate growing cultivar, but also produced the greatest amount of thatch. When comparing programs the late fall program had the best visual quality rating at spring greenup, and the lowest clipping yields for most of the season. The balanced program had the best overall visual quality. Majestic treated with the late fall program produced the most thatch. When comparing the individual fertilizer sources, there was little difference in the overall quality of the turf for the season. Urea and Fluf greened up earlier in May than Powder Blue of Formolene. Urea demonstrated better visual quality longer into the fall. Urea, Formolene, and Fluf produced the greatest amounts of clippings during the season. Effects of fertilizer source on thatch development or root weights showed greater thatch created by urea. In 1988, few interactions were observed in programs vs materials, materials vs cultivars, programs vs cultivars, or programs vs materials. Overall, thatch was affected significantly by cultivars and programs and interactions of these two variables. |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Moore, R. W., M. L. Agnew, and N. E. Christians. 1989. Evaluation of Liquid Fertilizer Programs on Three Kentucky Bluegrass Cultivars. Iowa Turfgrass Res. Rep. p. 72-77. |
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| Web URL(s):
https://listings.lib.msu.edu/iowat/1989.pdf#page=76
Last checked: 01/10/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 I55 |
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