1. Allen IG, Segarra E (2001) Anti-quality components in forage: overview, significance, and economic impact. J Range Manag 54:409–412
2. Ball DM, Collins M, Lacefield GD, Martin NP, Mertens DA, Olson KE, Putnam D, Undersander DJ, Wolf MW (2001) Understanding forage quality. 1-01. DH American Farm Bureau Federation Publication, Park Ridge, IL
3. Barnes RF, Marten GC (1979) Recent developments in predicting forage quality. J Anim Sci 48:1554–1560
4. Beever DE (1993) Ruminant animal production from forages: present position and future opportunities. In: Baker MJ (ed) Grasslands for our world. Wellington, SIR, pp 158–164
5. Broderick GA (2003) Effects of varying dietary protein and energy levels on the production of lactating dairy cows. J Dairy Sci 86:1370–1381