The correct sequence for the use of coupled implements for land preparation is

The correct sequence for the use of coupled implements for land preparation is plough, harrow, and ridger. Ploughing is the first operation in land preparation. It involves breaking the soil and turning it over to a certain depth. After ploughing, the soil is left in loose clods, and the next operation is harrowing. Harrowing helps to level the soil, break the clods into smaller pieces, and remove weeds and other unwanted debris from the soil surface. Once harrowing is done, the soil is ready for ridging. Ridging is the process of making raised beds or ridges on which crops are grown. It is done to improve drainage and aeration of the soil, especially in areas with heavy rainfall or poor drainage. Therefore, the correct sequence for the use of coupled implements for land preparation is ploughing, harrowing, and ridging.