1Received for publication November 13, 1969. Paper of the journal series, New Jersey Agricultural Experiment Station, Department of Horticulture and Forestry, New Brunswick, N. J.
2Now located at Institut de Recherches Agronomiques, Tel Amara par Rayak, Republique Libanaise.
3FTE (Fritted Trace Elements) is a product of Ferro Corp., Michigan Avenue, Cleveland, Ohio.
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