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A Comparison of a Large-Seeded (NC2) and a Small-Seeded (Starr) Peanut (Arachis hypogaea L.) Cultivar as Affected by Levels of Calcium Added to the Fruit Zone¹

ABSTRACT

Several greenhouse experiments were conducted to compare various Ca treatments on selected vegetative and reproductive characteristics of Starr and NC2 peanuts. Calcium and K uptake and distribution characteristics in Starr and NC2 peanut plant parts were studied also. Starr and NC2 peanuts were grown in sand cultures with separated rooting and fruiting containers for direct comparisons.

Starr and NC2 peanuts were dependent upon a Ca supply in the fruit zone for proper development of fruit. Starr peanuts produced a larger weight of kernels at low Ca levels than NC2 peanuts. Starr peanuts apparently make more efficient use of Ca for kernel development than the larger seeded NC2 peanuts.

¹ Journal Article 2194 of the Agr. Exp. Sta., Oklahoma State Univ., Stillwater. This research was supported by a NDEA Fellowship.

² Former Research Assistant, now Research Agronomist with Farmland Industries, Kansas City, Missouri 64116; and Associate Professor of Agronomy, Oklahoma State University, Stillwater.

Received for publication February 15, 1971. Accepted for publication September 17, 1971.