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References
Plank, C. O. 1989. Plant Analysis Handbook for Georgia. Cooperative Extension Service Pub., Univ. of Georgia, Athens, GA. 63 pages. http://aesl.ces.uga.edu/docbase/publications/plant/plant.html
Large, E. C. 1954. Growth stages in cereals: Illustration of the Feekes Scale. Plant Pathol. 3:128 - 129.
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