 |
ProCrop |
CROP RESIDUE LEFT BY TILLAGE OPERATIONS
| Tillage | Percent residue left after the operation | |
| Drills | -- disk type * -- hoe type |
90-95% 50-80% |
| Blades, sweeps 24" or wider | ||
| Rodweeder | -- without points or shovels -- with points or shovels |
90% 80% |
| Cultivators | -- 14"-22" sweeps -- 8"-12" shovels -- narrow shovels, chisels -- twisted shovel points |
85% 90% 75% 50% |
| Light disks operated at a depth of 3" or less | 70% | |
| Light disks operated at a depth of 3" or more | 50% | |
| Heavy disks operated at 6" depth | 30% | |
| Moldboard plow | 10% | |
| No-till summerfallow (approximately 21 months) | 50% | |
| Overwintering weathering | 70-80% |
* Applies to 14"-18" disks at 4-5 mph. Use lower values for larger diameter and higher speeds.
Example: A field with 3000 lbs/a residue.
First trip: cultivator with chisels, 3000 lbs x 75% = 2250 lbs.
Second trip: cultivator with chisels, 2250 lbs x 75% = 1687 lbs.
Following operations would continue to reduce the residue.
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| Terry Gregoire, Area Extension Specialist/Cropping Systems NDSU Extension Service Box 477, Traynor Building Devils Lake, ND 58301-0477 |
Phone No.(701)662-1364 FAX (701) 662-1365 tgregoir@ndsuext.nodak.edu |
