Subsequent harvests are called "first ratoon", "second ratoon", etc. In Jamaica to calculate decline in ratoon productivity a Ratoon Performance Index (RPI) is used. Yield of ratoon crop is a function of yield potential and its ratooning ability. Such a decline could be effectively prevented by proper ratoon management. It is able to ratoon with the highest degree of success in well-drained soils. In cultivating sugarcane, urea is side-dressed after planting, and applied to each ratoon crop.