The present invention provides a ground engaging film roller 30.2 having a generally horizontal axis of rotation and an outer circumference for engaging ground, the roller having opposed outer ends 30.21 of a larger circumference than the circumference of portions 30.22 located between the opposed ends.The present invention also provides a film deployment system having a ground engaging film roller as described above, which is rotationally mounted to a frame 30.1, the ground engaging film roller 30.2 receiving film from above and to a front location of the roller, and passing between a film locating roller 30.3 and the ground engaging roller 30.2, the ground engaging roller 30.2 shaping the ground it engages by forming a channel in ground at the opposed ends 30.21 of the roller 30.2 for the film to be located as it leaves engagement with the ground engaging roller 30.2.The present invention also provides an agricultural or horticultural implement 10, 30 for performing an agricultural or horticultural process, the implement 10,30 including whipper arrangement 50 at a location forward of where the process will be performed.The agricultural or horticultural implement 10, 30 can be such that to the rear of where the process is performed there can located film deployment system 30 as described above.
