Furthermore, the contribution of different field characteristics, on a farmer's land allocation to different rotation types, was assessed.
Six five-year crop rotation types were identified: cereal species monoculture, cereal monoculture, rotation with a break-crop, diverse crop rotation, perennial, non-permanent grassland rotation and environmental fallow rotation.
We found that different crop rotation types were applied on a farm, but that farmers have quite consistent drivers for land allocation to different rotation types; although, economic incentives influence the introduction, expansion and/or withdrawal of crops from rotations.
Rotation between sowing types was used as a semi-experiment based on 34 spring- vs. 41 autumn-sown cereal plots centred on infield non-crop islands of similar structure, size and surroundings.
The results demonstrated that the preferred operation type was rotation in the parasagittal plane and that the handle shape should be convenient for operating with a downward-facing palm posture.
One type is a rapid rotation of chain segments that gives rise to twist defects at various points along the chain.
The third type is symmetric under rotation of order 6, and therefore constitutes the symmetric component of variation.
We find that the baseline-subtracted responses to these two types of rotation stimuli are significantly correlated (rightward rotation: Spearman r = 0.50, p < 0.001; leftward rotation: Spearman r = 0.39; p = 0.001), supporting the presence of a rotation signal derived from purely visual cues (REW) in area VIP.
Generally, the period for the first type of rotation is a half year and for the second type is about three months.
A static model to determine the critical wind speed for overturn-, sideslip- and rotation-type of accidents is considered.
