Cereals Quality Survey Methodology


The 2011 Cereals Quality Survey represents the 38th time the AHDB Cereals & Oilseeds has produced an authoritative assessment of wheat and barley quality in Great Britain. As always, the CQS involves a large quantity of data being received from cereals laboratories across the GB which are analysed and then made available to the industry in a number of different ways.

The CQS continues to build on improvements made over previous years. So far this year (to 31st August), 18,000 samples of wheat and 10,000 samples of barley have been collected from laboratories around Great Britain. Each sample result provides information on variety, sampling date and region of origin and also contains data on one or more of Moisture Content, Protein Content, Nitrogen Content, Hagberg Falling Number, Specific Weight and Screening Results.

Results are presented in two main forms. Firstly, spreadsheets and PDF files made available on the AHDB Cereals & Oilseeds website (and also by request) allow us to trace particular characteristics of the current-season crop and how it measures up against previous seasons. The Cereals Quality Calculator, which allows users to discover the proportion of the wheat or barley crop that meets a specific criteria, is running with 2010 data and will be updated when final 2011 data becomes available. It also provides similar information for previous seasons, going as far back as harvest 2000.

As with any statistical survey, a level of sampling bias exists within the Cereals Quality Survey. Although every effort has been made to minimise this level, since not all producers have had their wheat and barley tested, the results can only be viewed as good estimates.