pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-7-2-5 Articles Peanut Maturity Method Evaluations. I. Southeast T. H. Sanders , E. J. Williams , A. M. Schubert , and H. E. Pattee 1 Plant Physiologist, National Peanut Research Laboratory, USDA, SEA/AR, P. O. Box 637, Dawson, GA 31742; Agricultural Engineer, harvesting and Processing Research, USDA, SEA/AR, Tifton, GA 31793; Assistant Professor, TAES, TAMU Plant Disease Research Station, Yoakum, TX 77995; Research Chemist, USDA, SEA/AR, NCSU, Raleigh, N. C. 27650, respectively 7 1980 7 2 78 82 12 8 1980 American Peanut Research and Education Society 1980 American Peanut Research and Education Society Abstract

Arginine maturity index, methanol extract, shellout, and seed-hull maturity index methods of determining peanut (Arachis hypogaea L.) maturity were compared. Peanuts from four planting dates in 1978 were used. The comparisons showed that some of the methods are affected by date of planting and environmental factors, such as drought stress. Under the conditions of this test, the seed-hull maturity index and shellout were the most consistent indicators of the optimum yield period in 1978.

 Key Words Arachis hypogaea; , Groundnut; , Arginine Maturity Index; , Seed-Hull Maturity Index; , Shellout; , Methanol Extract