Seed Technology
Vol. 21, no. l 1999

Editorial - Dennis TeKrony ......................................................................................3

Effect of Large Diurnal Temperature Variation on Alfalfa Seed
Germination and Hard Seed Content /
D. G. Stout, B. Brooke and J. W. Hall. ...................................................................5

Electrical Conductivity and Field Performance of Soybean Seeds /
R. D. Vieira, 1. A. Paiva A. and D. Perecin ...........................................................15

Variability of Germination Tests of Corn and Soybeans /
H. Liu, L. 0. Copeland, 0. Schabenberger and D. Jamieson. ....................................25

Seed Tech NOTES

The Effect of Storage Conditions on Peroxidase Activity /
R. A. Vierling and D. M. TeKrony ........................................................................37

Calcium Nitrate to Control Collar Rot During Chickpea
Germination / Neal R. Foster .................................................................................41

Ion Leakage as an Indicator of Vigor in Field Bean Seeds /
M. A. Barros, S. Ohse and J. Marcos-Filho .........................................................44

Tachigaren: Phytotoxic Effects on Sugarbeet Seed Germination
and Emergence / Mark Anfinrud ...........................................................................49

Final Seed Research REPORTS
Projects funded by American Seed Research Foundation

Forty Years of Serving the Seed Industry and Seed Technology:
The American Seed Research Foundation - John E. Cross ..................................55

Volatile Compounds as Indicators of Seed Quality and Their
Influence on Seed Aging / A. G. Taylor, P. C. Lee and M. Zhang . . .................. 57

Increasing Chilling Tolerance of Seeds During Imbibition and

Early Stages of Germination / Paul H. Jennings ..................................................66

Somatic Embryogenesis Using Cucumis sativus L. Cotyledons /
N. M. P. Guedes and Paul H. Jennings .............................................................72

Predicting Changes in Corn Seed Germination During Storage /
D. M. TeKrony, D. B. Egli and Shando Tang ...................................................77

Characterization of a Vivipary I Homologue in Wheat /
M. E. Sorrells, D. Benscher, W. A. Wilson, J. Zhu, S. Graznak and
D. M. Lupold .................................................................................................87

Instructions to Authors ...................................................................................99