Fig. 3. Degradability of total cell wall polysaccharides after 24- and 96-h in vitro incubations with rumen microorganisms for the fourth elongated internode above ground level, averaged across maize hybrids 632, 679, and 2677, sampled at 10 stages of development. The arrow located between the fifth and sixth sampling dates represents the approximate time when elongation of the internodes ceased. LSD, least significant difference (P < 0.05).