1. American Seed Trade (2005) Seed statistics. On-line database. Available on-line at http://www.amseed.com/about_statistics.asp. Verified 21 November 2005
2. Andrae, J, Lacy C (2004) Is maxQ economical for cow-calf producers. Available on-line at http://commodities. caes.uga.edu/fieldcrops/forages/Ga_Cat_Arc/2004/jul04. pdf. Verified 31 March 2006
3. Ball DM, Hoveland CS, Lacefield GD (1996) Southern forages, 2nd edn. Potash & Phosphate Institute, Norcross GA (USA)
4. Bouton JH (2001) Alfalfa. In: Gomide JA, Mattos WRS, da Silva SC (eds) Proc. XIX international grassland congress, Sao Pedro, Sao Paulo Brazil. 11–21 February 2001. FEALQ, Piracicaba SP Brazil, pp 545– 547
5. Bouton JH (2000) Use of endophytic fungi for pasture improvement in the USA. In: Paul VH, Dapprich PD (eds) The grassland conference 2000, 4th international neotyphodium/grass interaction symposium. 27–29 September 2000. Soest, Germany, pp 163–168