Plot Comments These plots show the benefit of a CTIS system installed on a forage harvester. The harvester has a heavy front axle load and the high pressure tires can be lowered in the field to reduce the stress in the topsoil. […]
Plot Comments Large tires at a moderate pressure again show lower stress in the upper soil. Heavy weight is apparent with the stress at 20 inch depth. […]
Plot Comments This combine showed very high surface stress. Very similar to the D16 plot. Most of the weight is carried by the mid rollers of the track unit. […]
Plot Comments This combine, although it was sporting VF radial tires, still had 41 psi This is seen in the plot with very high stress at the surface […]
Plot Comments This combine shows a similar trend to most combines Heavy weight will tend to show more stress at depth Dual wheels at 30psi is on the high end of a combine setup. […]
Plot Comments The weight of this machine can be distributed over a wider track and reduce the stress at 6 and 12 inches. However, the stress at 20 inches was very similar for both the wide and narrow tracks. […]
Plot Comments Very narrow and high pressure tire on the sprayer combined with a heavy load means increase stress at all depths. The D9_justtractor_1 plot shows the tractor driving over the sensor and backing up over the sensor again to avoid the sprayer damaging the measurement equipment. The middle peaks on the plot are the rear tire […]
Plot Comments This is a much light tractor but has significantly high tire pressures. The tire are also have a round contact profile. The higher stress at 6 inches is an effect of the high tire pressure. Lower stress at depth compared to other heavier tractors is due to the much lower weight. […]
Plot Comments The first plot D7_1 is the outer dual. This tire would not be carrying an equal load as the inside dual is inflated more. The inner dual show a higher stress under the front tire which would be expected dual to the much higher tire pressure. […]
Plot Comments This is a lighter tractor than the others tested. Slightly lower stress even with narrower tires. D6_D28_4 only the left two peaks are the tractor. The _4 sensor location had significantly more moisture in the top 12 inches with would explain the higher stresses in the top two sensors at this location. […]
Plot Comments Similar stress at depth compared to D4, The higher pressure tires compared to D4 mean a higher stress at 6 inch depth. This was the stress under the outer dual. It would be expected that stress under the inner duals would be higher as they have higher pressure and would carry more of […]
Plot Comments Even with the large tires on this tractor, then total weight is still causing stress at depth. Stress at the surface is significantly lower than would be expected with a narrower tire at higher pressure. […]
Plot Comments This buggy is heavy, higher stress in the lower depths when compared to light equipment. The variation in the green curve on both plots may be due to lug spacing and roller contact. […]
Plot Comments Similar results to D1 and D2, this unit we tested the distribution underneath the track. The sensor was align under the outer lug, inner lug and down the center of the track. The center of the track had slightly lower stress since there was no direct contact to the rollers. Also notice how only […]
Plot Comments D2_3, D2_L_3 This Unit was tested at the _3 installation. This is a wheel tractor, comparable stress at depth effect compared to D1 as even accounting for lighter axle weight. […]