Unit E44: Montag Dry Fertilizer Aircart w Tandem 500/45-22.5 Bias + CaseIH 280 Row Crop Tractor w Dual 420s Posted on January 21, 2019 (January 21, 2022) by Alex Barrie in Compaction Test Results Datasheets Plot Comments This shows the response of the air cart (last two peaks on plot).The response is similar on both sides of the machine.The lower response on the left side was due to misalignment with the sensor.