Palm kernel meal and copra meal are derived from the nuts of palm trees and are available in large quantities in many tropical countries. These potential feedstuffs are not widely used either for animal production or other purposes. Due to their high fibre contents, imbalanced amino acids, Maillard products (due to heat damage during drying and oil extraction processes) and their susceptibility to mould attack, these by-products have been regarded as low quality feedstuffs. However, if their value could be improved so that their inclusion in animal feeds resulted in good production, there would be a large number of benefits. This book, therefore, provides ways to improve the feeding values of these two agricultural feedstuffs, either by enzymatic or physical treatments.