4 field crop rotation is better than 3 year crop rotation because it could get the job done faster

Crop rotation are grown in definite cycle but land rotation are net growwn in any

No, The crop rotation is to avoide soil erosion.

Crop rotation allows the soil to recover. Proper crop rotation will replace nutrients that are consumed by the previous crop. Planting the same crop year after year will deplete certain nutrients and make the soil unproductive.

Middle Eastern farmers were the inventors of crop rotations. They were known to practice crop rotation as early as 6000 BC.