Centre county Pennsylvania, USA | Thanks for link on slope affecting yield monitor. I checked difference in mapped yield for side-by-side one acre areas of equal but opposite slope (combine attitude) that are shown as bands in southeast edge of combine attitude map for JS-7 posted above . One area had combine attitude (slope) of + 6 degrees and other had combine attitude (slope) of - 6 degrees. Average yield difference between those slopes was 7%. That agrees closely with the 6% mentioned in your linked paper.
Yield monitor mapped yields are consistently greater for positive combine attitude (up slope) than they are for negative ( down slope) in all of our fields. That seems to say that slope induced yield monitor errors could be compensated to some degree by using combine slope computed from first differences in DGPS 3D position ? |
Combine attitude and Yield map color stripping
