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Published in Agron J 59:450-453 (1967)
© 1967 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Limestone and Nitrogen on Soil pH and Coastal Bermudagrass Yield1

W. E. Adams, R. W. Pearson, W. A. Jackson and R. A. McCreery2

‘Coastal’ bermudagrass was grown on an extremely acid Cecil sandy loam soil in order to study the influence of limestone rate (0, 7~846, and 40,349 kg/ha), limestone placement (surface and mixed), and N levels (0, 224, 448, 896, and 1,793 kg/ha) on forage production, rooting, and changes in soil properties.

Without limestone, annual forage production declined with time at the 448-kg/ha N level and above, and Coastal bermudagrass plants exhibited a severe chlorosis. At the two highest N levels (896 and 1,793 kg/ha), up~o 90% of the plants died.

Limestone increased annual forage yields at N rates of 896 kg/ha and above. Mixing the limestone with the surface soil resulted in significantly higher forage yields at the 1,793-kg/ha level. The movement of Ca and Mg into all soil zones down to the 30- to 45-cm zone confirmed the changes in soil pH.

Soil pH was reduced by annual applications of 448 kg/ha of 1N and forage yields of Coastal bermudagrass were severely restricted.

Coastal roots penetrated to 120 cm in soil with a range in pH from 4.0 to 4.5, emphasizing the extreme tolerance of this grass to very low soil pH.

Key Words: lime placement • profile acidity • exchangeable Ca • exchangeable Mg • root yield • root distribution

1 Contribution from the Southern Branch, Soil and Water Conservation Research Division, Agricultural ,Research Service, USDA, in cooperation with the Georgia Agricultural Experiment Stations.

2 Research Soil Scientists, USDA-ARS, Watkinsville, Ga.; and Auburn, Ala.; Chemist, USDA-ARS, Watkinsville, Ga.; and Agronomist, College Experiment Station, University of Georgia, Athens.

Received for publication March 25, 1967.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1967 by the American Society of Agronomy.