to reduce air volume too much. A chaffer opened too wide and air too low 

 may result in the tough fescue stems clogging the tailings elevator. 



Rescue 



Because rescue grass seed are light and fluffy (1) Grain elevators 

 may plug and limit ground speed, (2) chaffers and sieves have to be opened 

 fairly wide otherwise enough material enters the tailings auger to plug the 

 tailings elevator, (3) air volunne must be low, and (4) since chaffer and 

 sieve must be fairly wide open, trash cannot be kept out of the grain bin-- 

 this condition worsens in low -yielding fields. Threshing and cleaning losses 

 are usually low in rescue; cleaning losses may appear to be high, but close 

 examination usually shows few mature seed in the chaff, if the machine is 

 adjusted properly. 



Lespedeza 



Cutterbar shatter losses are usually significant in lespedeza and 

 similar crops. However, an attachment invented by a South Carolina grower 

 increased harvested yields by 10 to 25 percent. It consists of a snnall 

 trough and auger that mounts below the sickle and a chain-driven elevator. 

 Slots, cut just behind the sickle, let the shattered seed fall into the auger 

 trough. They are then augered onto the elevator and carried to a sack. 



Threshing and cleaning losses are usually low, if the crop is mature 

 and if the machine is adjusted properly. Generally, wide spacing between 

 cylinder and concaves and low cylinder speed leave a minimum of un- 

 threshed and hulled seed. The chaffer should be adjusted to return few 

 seed in the tailings. Seed in the tailings are affected by cleaning air. A 

 critical point exists where a slight increase in air greatly increases 

 amount of seed in the tailings. High ground speeds often cause less cutter- 

 bar shatter than slow speeds. 



Standard guards are recommended for the cutterbar, if the fields to 

 be harvested contain excessive straw^ from previous crops. 



Birdsfoot trefoil 



Excessive seed gernnination losses because of faulty threshing occur 

 often, even though unthreshed seed losses are usually negligible. A slow- 

 as -possible cylinder speed should reduce this type of loss. 



Other Considerations 



Draper -type pickup attachments, which utilize an endless, slatted 

 canvas, are better than other types for harvesting swaths or windrows 

 because seed shattered by the pickup fingers are carried into the combine 

 by the canvas. 



In some tests, windrows and swaths were combined without special 

 pickup attachments by using a tined reel and a live sickle. In heavy growth, 

 this method was usually as good as attachment methods and sometimes 

 proved superior. It is cheaper than the other methods because no attach- 

 ments have to be purchased or changes made on the combine. However, 



