Harvesting System Design and Performance - Engineering and Science of Biomass Feedstock Production and Provision - page 127

Fig. 5.38 Combine-balersystems.( a )AGCO-developedcombine-balerbalingcornstover.Photo
courtesyofAGCOCorporation[ 34 ]. ( b ) Single-pass machine showing grain harvest and corn
stover baling. Photo courtesy of Dr. Matthew Darr, Iowa State University [ 35 ]

5.4.4.3 Two-Pass Harvest of Corn Stover

A two-pass system to harvest grain and stover was developed (Fig. 5.39b ) and com-
pared with a single-pass harvester [ 36 ]. The first pass of the two-pass system con-
sisted of grain harvest, stover gathering, and windrow formation. The second pass
involved picking up the windrow with a self-propelled forage harvester fitted with
a windrow pickup head. The performance data are shown in Table 5.13 . The two-
pass grain harvest system reduced area productivity by 9 % compared to the conven-
tional grain harvest system.