Abstract
1. It has been shown that both the variety of wheat and the environment under which growth took place influenced the quantities of starch and cell wall carbohydrate contents of wheat. 2. The different varieties of wheat investigated contained different proportions of water-soluble to water-insoluble hemicelluloses. 3. By comparison of the arabinose to xylose ratios it was concluded that water-soluble and insoluble arabinoxylans of wheat were branched to the same degree. 4. Starch from six wheat varieties grown in the UK was very well digested by adult cockerels and true metabolisable energy values of the wheats were high. 5. Small amounts of cell wall carbohydrates were digested by adult cockerels.