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Published online 1 January 1969
Published in Agron J 61:4-6 (1969)
© 1969 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Nitrogen and Phosphorus Placements and Rates on Turfgrass Establishment1

J. W. King and C. R. Skogley2

The effects of several rates, ratios, and placements of nitrogen and phosphorus on bluegrass-red rescue turfgrass establishment were investigated.

Fall and spring field trials were conducted on Bridgehampton silt loam of low fertility. The fertilizer placement treatments were (1) surface applied, (2) mixed into the-upper 10 cm of soil, and (3) 3/4 mixed into the upper 10 cm of soil and 1/4 surface applied. Phosphorus in the form of superphosphate was applied at rates of 490, 980, 1,960 and 3,920 g of phosphorus/100 m2. Nitrogen in the form of ammonium nitrate was applied at rates of 375 and 1,470 g of nltrogen/100 m2

The effects of establishment treatments lasted for only a few months. Initially, the higher nitrogen rate resulted in improved turfgrass quality and top growth. No seedlling injury from the 1,470-g nitrogen rate was observed. The surface and 3/4-1/4 fertilizer placements produced equally satisfactory results. Response to phosphorus levels was inconsistent. No significant differences in root weights were detected. Applications of maintenance fertilizer resulted in great improvement in turfgrass quality and top growth.

Key Words: turfgrass establishment • fertilizer placement • Poa prantensis L. • Festuca rubra L. • turfgrass management

1 Contribution no. 1198, Agricultural Experiment Station, Kiagston, R.I. 02881.

2 Former graduate assistant (now graduate teaching assistant, Department of Crop Science, Michigan State University, East Lansing 4:8823) and Associate Professor, respectively, Department of Agronomy & Mechanized Agriculture.

Received for publication June 15, 1968.




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Copyright © 1969 by the American Society of Agronomy.