Islam et al., (2003); Mwendia et al., also stated that the proportion of leaf fractions is positively correlated to the concentration of plant CP and digestible energy and in turn determines the intake and animal performance . Islam et al., (1996) observed the proportions of botanical fractions and their internal structure determine the nutritive value and intake of forages. Factors affecting proportions of botanical fractions and their nutritive value therefore may have important implications to manipulate nutritive value and intake of forages by animals. Goldson , (1977) conducted a experiment in East Africa particularly in Kenya, several of tall cultivars have been selected and tested over a wide range of environments . The common cultivars are Bana, French Cameroon, Clone 13 and Pakistan hybrid. Bana is the most popular and is characterized by short succulent stems with broad leaves and has the least tendency to be stemy at maturity. French Cameroon which grows up to 3 m is stemy and hairy. The hairy nature of some Napier grass varieties traps moisture thus creating a suitable microcatchment for a fungal infestation (white mold, Spharaedea beniwoskia). Reid et al., (1973) reported generally leaves of grasses contained more crude protein and cell contents than the stem. 2.6.