The isolation distance maintained for paddy is

The isolation distance maintained for paddy is 3 m.
Isolation distance is the minimum separation required between two or more varieties of the same species to keep the seed pure. The isolation distance is essential to prevent pollination from unwanted pollen in the case of cross-pollinated and often cross-pollinated species.
Isolation distance should be maintained to avoid varietal contamination of seed. Isolation distance is the distance by which the seed crop is separated from any other variety of the same crop.