2Buck master D R, Heinrichs A J. Losses and quality changes during harvest and storage ofpreservative treated alfalfa hay [ J]. transaction of the ASAE, 1993,36(2) :349 - 553.
3Rotz C A, Abrams S M, Davis R J. Alfalfa drying, loss and quality as influeneed by mechanical and chemical condition- ing[ J]. Transaction of ASAE, 1987,30(3 ) :630 - 635.