| Greenup enhancement of Kentucky bluegrass via early spring mowing
| Gilstrap, David; Nikolai, Thom; Amundsen, Keenan. 1999. Michigan State University Sod Producers Field Day. p. 12.
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| Twenty nitrogen protocols on commercial lawn turf
| Gilstrap, David; Rieke, Paul; Nikolai, Thom. 1999. Michigan State University Sod Producers Field Day. p. 12.
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| Kentucky bluegrass height-of-cut study
| Gilstrap, David. 1999. Michigan State University Sod Producers Field Day. p. 12.
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| Fungicide-resistant Sclerotinia homoeocarpar studies
| Gilstrap, David; Vargas, Joe Jr. 1999. Michigan State University Sod Producers Field Day. p. 12.
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| Lawn irrigation, species, fertility study
| Gilstrap, David; Rieke, Paul; Nikolai, Thom. 1999. Michigan State University Sod Producers Field Day. p. 12.
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| Shade research for Michigan home and commercial lawns
| Gilstrap, David; Rieke, Paul; Baird, James. 1999. Michigan State University Sod Producers Field Day. p. 12.
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