6Mould FL., Predicting feed quality-chemical analysis and in vitro evaluation. Field Crops Research, 2003, 84(1): 31~44.
7Boisen S., Fernhdez JA, Prediction of the total tract digestibility of energy in feedstuffs and pig diets by in vitro analyses, Animal Feed Science Technology, 1997, 68(2): 277~286.
8Aarseth KA., Prestl?kken E., Mechanical properties of feed pellets:Weibull Analysis. Biosystems Engineering, 2003, 84(3): 349~361.
9Bosch MW., Tamminga S., Van Bruchem. Dietary and animal factors affecting rumen capacity in dairy cows. Archives of Animal Breeding, 1991, 34(3): 369~481.
10Stuth J., Jama A., Tolleson D., Direct and indirect means of predicting forage quality through near infrared reflectance spectroscopy. Field Crops Research, 2003, 84(1): 45~56.