Residue remaining
2720 remaining residue in corn stalksTypical percentages of residue cover remaining from the 2720 Combination Ripper are listed in the table. These percentages do not take into account variables such as the conditions of the residue, speed, and soil type.
NOTE: Percentages assume disk gangs are operating at 152 mm (6 in.) of depth.
Starting residue cover (percent) | Remaining non-fragile* residue cover (percent) | Remaining fragile** residue cover (percent) |
57 mm (2.25 in.) point | 178 mm (7 in.) point | 57 mm (2.25 in.) point | 178 mm (7 in.) point |
100 | 40 | 35 | 15 | 12 |
90 | 36 | 32 | 14 | 11 |
80 | 32 | 28 | 12 | 10 |
70 | 28 | 25 | 11 | 8 |
60 | 24 | 21 | 9 | 7 |
50 | 20 | 18 | 8 | 6 |
40 | 16 | 14 | 6 | 5 |
The 2720 offers increased weight per blade over the 512 to penetrate rock-hard soils and deliver up to 203.2 mm (8 in.) of blade working depth to bury residue. The chart below details the weight per blade of the 2720 with and without a basket versus the 512.
Model/Size | 5 standard | 7 standard (folding) | 7 standard (non-folding) | 9 standard | 11 standard |
512 | 288 | 272 | 279 | 333 | Not applicable |
2720 without baskets | 359 | 372 | 345 | 439 | 421 |
2720 with baskets | 392 | Not applicable | 410 | 474 | 456 |
The 2720 achieves increased weight per blade over the 512 because of the following:
Mainframe fore/aft tubes increased from 152.4x152.4 mm (6x6 in.) on the 512 to
177.8x177.8 mm (7x7 in.) on the 2720
Mainframe fore/aft tubes increased from 9.5-mm (0.38-in.) thick on the 512 to 12.7-mm (0.5-in.) thick on the 2720
Wing frames have changed from 6.4-mm (0.25-in.) thick on the 512 to 9.5-mm (0.38-in.) thick on the 2720
Increase in gang bolt size
Cast spools
2720 burying corn residue*Non-fragile residue includes crops like corn, sorghum, and wheat (more than 45 bu).
**Fragile residue includes crops: soybeans, edible beans, peas, wheat (less than 45 bu), sunflower, peanuts, and cotton.