Over 4,400 harvest samples from Canadian grain producers have already arrived at the Canadian Grain Commission but they need more to make sure the quality data is representative of this year's crop.

The Canadian Grain Commission mailed out harvest sample kits in August and samples began arriving at the Commission's headquarters soon after.

Producers who are not already registered have until October 15, 2015 to sign up.

Registration can be completed online or by calling 1-800-853-6705.

The Harvest Sample Program is voluntary and free to producers.

In exchange for taking part, participants receive an unofficial grade and quality information about their grain.

Each fall, the Canadian Grain Commission publishes quality data based on analysis of harvest samples. This data is used to promote the sale of Canadian grain.

The information includes things like protein content on cereal grains and pulses, oil, protein and chlorophyll content for canola and oil and protein content and iodine value for flaxseed.