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Plot Harvester Clean-Out Procedures

In response to growing demand for
consistent high-quality identity preserved grain and oilseeds Iowa State University Extension developed this program to help researchers, harvesters and federal compliance
inspectors preserve the identity and prevent commingling of harvested
products using the procedures demonstrated today along with proper planting harvesting and grain handling techniques will help
ensure you’re producing a crop that you planted and prevent commingling going of the
harvested product. Since every situation is different you’ll need to determine what level of
identity preservation and limits to commingling you want to
achieve. As the goal of most plots is 100 percent purity insuring your grain is not commingled at all
that any stage a planting harvesting for handling is important in
the prevention adventitious presence have the product
and the human food or animal feed chain. Following the
clean out or annual inspection procedures in this program will help minimize grain
mixing in the harvesting process. This program
was developed as a supplement to combine clean out procedures for identity
preserved grain. A video produced by Iowa State
University Extension in September 2002 cleanup procedures for many parts of
larger plot combines are virtually the same as procedures shown for commercial
combines in that video. That program should be reviewed before
watching this plot harvester clean out an inspection video safety procedures shown in the previous
combine cleanup video such as mechanically blocking ahead
before getting underneath it and making sure all doors and shields are closed
after cleaning are common to both commercial and plot
combines. This video was produced to familiarize
US Clean Air inspection procedures for plot combines.
Check the operator’s manual for manufactures advice on how to clean out
your specific harvester these machines are designed primarily to
harvest information such as yield, moisture content and
quality traits. Harvesting boat grain is secondary. There
are two major categories of plot combines, larger commercial product combines that
have been modified for plot harvesting. And smaller combines, manufactured specifically for plot
harvesting although they’re produced for different purposes the overall design of plot combines is
similar to large commercial combine harvesters. And they share many of the same systems
and components with their larger counterparts the major difference is that the flow
path for the harvesting grain is diverted into a small hopper so grain can be weighed and sampled for
moisture or other quality traits before being transferred to the bulk
storage tank or bag for further analysis. For corn yield trials where grain from
small plots can be pulled after yielding moisture data for a plot has been
recorded it’s comm to use a modified commercial
combine the addition of a diverter commonly a
movable flap at the top of the clean grain elevator
allows grain to flow into a small hopper where it can be weighed and sampled from
moisture and called it rates via conveyor such as a small auger. Or, transferred to a sample bag areas to inspect and clean and the
modified particle part combine include the area around the diverter flap near the top of the clean grain
elevator. Check in and around the weighing Harper if an auger is used to move grain from the
weighing hopper to the boat storage bin clean and inspect the ardor something in
return pass to the grain tank. Although accessibility may be limited look for access panels at points in a
system where materials may flood or regular maintenance is required. If a
moisture sampling system as president it typically uses pneumatic air tubes they should be inspected and cleaned as
necessary remove hose clamps to clear drain from
troops they may sell and lower areas or near bins. Finally, inspect areas where a loose grain may fall
during the bagging of moisture samples. All other areas should be cleaned and
inspected as detailed and procedures for cleaning commercial combines. Small plot combines are used to harvest
and segregate specific grain for seed selection these small plot harvesters have similar
functional areas as large commercial combines. Gathering, threshing, separating, cleaning, and collecting the grain. Differences
first typically included the absence of a rock trap, the use of
cleaning sieves rather than straw walkers from material separation and pneumatic conveyors for transfer
of grain following separation. A feature that differentiates the specialized small plot combine from larger commercial combines is the absence of a
grain storage bin, instead the plot harvester features a
cyclone separator which feeds harvested grain to a small
hopper and bag collection area. the cyclone separators typically at the
top of the harvester The cyclone is usually clean and free of
ledges that could catch a residual grain but open the top if possible. Clean and inspect through this exit and the bottom exit. Look carefully
around below the cyclone where collection bags are filled, grain can miss the bag and spill onto the
operator station or engine platform. Moving to ground level common areas for
residual material to collect include the gathering mechanisms around the head, the cylinder and sieves. Be sure to mechanically lock or block the head before checking the underside
of it. Check for removable shields around the head and inspect and clean the underside if
the head is a row crop style with two or more rows hind shields on the snouts should be
lifted for cleaning and inspection around the gathering mechanisms. Inspect and clean the feeder area in front of the cylinder, there may be an access door to make
inspections of this area easier. Moving to the back of the machine the
rear the machine should be easily accessible there may be a removable rear panel sieves should be removed, wiped clear of residue, and inspected. The rear cavity behind the
cylinder and the grain transfer to but the bottom
should be inspected while the sieves are out. Although sections of the grain transfer
tube are not generally accessible check bends and elbows for access
panels that can be open. All other areas should be cleaned and
inspected finally carefully inspect the combine
chess frame and tires for grain and residue. Be sure to document date and sign your
cleaning or inspection form as required. Being able to reliably clean harvest equipment so grain remains segregated and seed stocks remain pure is important
to research and development as well as end-users. Following the
procedures outlined in this video will help you to maintain the integrity of
harvest information gleaned from plot work. Plot work is a key component in the
development of grain and oilseed products for agriculture. Credibility with end-use customers and federal inspectors depends on the
ability to maintain product quality. identity and the prevention of commingling.

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