What is the fine-grained topic of the following text: It was originally planted to one acre of Pinot Noir and six acres of Chardonnay; however in 2006 the acreage was changed to 3.5 acres of Pinot Noir and 3.5 acres of Chardonnay. Only return the topic.
Vineyard Acreage Allocation Changes for Pinot Noir and Chardonnay