The present invention relates to a rotavator blade and a fastening means to simplify the rotavator blade assembly on to a tractor cultivator. The rotavator blade for a rotavator comprises of a plate 301 with a square shaped curvature wherein the plate 301 is 5 having predetermined area and weight. Further, the plate 301 includes at least two non-circular holes 302 with a predetermined size, a working portion 303 and a supporting portion 304. The working portion 303 is having a predetermined height and a predetermined radius for the curvature. The two non-circular holes 302 are provided at one end of the supporting portion 304. A predetermined hole distance 305 is maintained 10 between centre of the two non-circular holes 302. The hole distance 305 can be adjusted by changing the fixing position of a fastening means. The fastening means comprises of a special shaped bolt and a nut 403.
