References
Dalrymple, R. L. 1999. Low-input overseeding. Ardmore, Okla.: The Samuel Roberts Noble Foundation. Pub. no. NF-FO-99-17.

Dalrymple, R. L. 1979. Plains bluestem. Ardmore, Okla.: The Samuel Roberts Noble Foundation. Pub. no. FO 15.

Evers, G. 1986. Fertilizer-clover seed contact time on clover emergence and growth. Forage Research in Texas, 1986 (Texas Agricultural Experiment Station) CPR-4499: 59-60.

Griffith, C. A. Calibration of planting and applicating equipment. Ardmore, Okla.: The Samuel Roberts Noble Foundation, n.d. 16 pp.

Acknowledgments
We credit Dooly Barlow, Grant Huggins and Cara Wallace for reviewing and editing this manuscript.