1. Pruning is done to keep the shrub at a convenient height of about 40 to 50 cm. It encourages the growth of new shoots with softer leaves. 2. Roasting is done to improve the flavour and taste of coffee. Roasting gives brown colour and pleasing aroma. 3. Millets need rainfall ranging between 50 cm – 120 cm, that is, they do not need much rainfall. Because of this feature, millets are called ‘DRY’ crops.