7Karayel D,Wiesehoff M,Ozmerzi A,et al. Laboratory measurement of seed drill seed spacing and velocity of fall of seeds using high speed camera system [J]. Computers and Electronics in Agriculture,2006 (50) :89-96. 被引量：1
8Ryu I H, Kim K U. Design of roller type metering device for precision planting [J]. Transactions of ASAE, 1998 ,41(4): 923-930. 被引量：1
