Under Argentine wine laws, if a grape name appears on the wine label, 100% of the wine must be composed that grape variety.[34] The backbone of the early Argentine wine industry was the high yielding, pink skin grapes Cereza, Criolla Chica and Criolla Grande which still account for nearly 30% of all vines planted in Argentina today. Very vigorous vines, these varieties are able to produce many clusters weighing as much as 9 pounds (4 kg) and tend to produce pink or deeply colored white wines that oxidize easily and often have noticeable sweetness.[2]