Other researches show that row cleaner attachment
performance was superior to that of rolling coulter, for
example Kaspar and Erbach (1998) concluded that row
cleaner attachment retained less surface residue as
compared to offset-bubble coulter; row cleaner also
retains lower subsurface residue. Surface residue slow
emergence and early growth of corn by slowing soil
warming (Van Wijk et al., 1959; Gupta et al., 1983;
Swan et al., 1996) and subsurface residue in the seed
rows have the potential to reduce seed to soil contact
(Kushwaha et al., 1986). Furthermore, Tourn et al.
(2003) observed that row-crop planter equipped with
row cleaner positioned in front of the coulter had the
best performance in terms of crop emergence as
compared to row-crop planter equipped with either a
coulter followed by a row cleaner or a single coulter.