Vineyards vary substantially in the quantity and quality of grapes they produce. Yield and various measures of quality are known to vary widely within blocks and along rows. Two consequences of this are the uncertainty in the prediction of yield, and delivery of grapes of inconsistent quality to the winery. As part of Project 1.1.1, Rob Bramley and Susie Williams have produced an easy to read guide (2.6mb PDF) that takes you through the necessary steps for the production of robust grape yield maps.