Roller is designed small to pulled by power tiller which is owned by most of the farmers. The cutting knifes are put to reduce dose and efficiency of herbicides use.
Small roller without knife pulled by power tiller is used roll down the Pigeon pea. It looks difficult for a shrub crop like pigeon pea, but operationally it is feasible.
Knife roller is attached with a tractor to roll down the Stylo. It is advised to roll two passages to kill the maximum, so it could reduce the dose of spraying herbicides. Only rolling is enough to induce deposition of Stylo that is intercropped in the fruit trees or rubber.