Since harvest finished we have been levelling out and restoring the slight slope to all the fields that had chickpeas in them, all the fields lose their level and slope over time from irrigation and other farm processes like ploughing. These particular fields were also flooded in the 2012 floods causing a large amount of silt to dumped in various spots over the field destroying the slope.
To restore the slope and level of the field the first step is to go over each field with the grader board to knock out the stubble, level the hills and flatten out all the little bumps and ditches. The grader board goes over each field twice at different angles going across the rows to get the best possible level on it.
After the grader board goes though the surveyor enters the field and takes survey heights every 50 metres in the field, these spot heights are then laid out on a map and the slope is worked out. For each height on the map the desired height and the difference is written out on the map to determine whether that height is lower (fill section) than the desired height or if the height is higher (cut section).
The data is then loaded into the laser, the laser is put in the middle of the field and sends a signal to the bucket that tells it to lift or lower the bucket depending on the height it needs to make that area of the field. When the bucket is full they dump it over a fill section to get it to the level that it needs to be at. After the field has been levelled by the laser bucket the grader board goes back over it to give it the final trim and join up sections that may have been levelled to different heights.
While this process sounds pretty quick and simple it took 8 days for the two laser buckets to do the one field in the picture above, for a video of the laser bucket action see below.