Introduction

Shrubs and forbs are of utmost importance in parts of the world where there is an arid or semiarid environment and where inadequate feeds constrain animal production and survival. They are considered of limited economic importance, however, to animal production systems in much of North America and Europe, where there are improved pastures and hay fields. In Northern Africa, 60 70% of rangeland production and 40% of total animal feed is browse. There are some 200,000 hectares of cultivated forage trees and shrubs in Australia, with three species Leucaena (Leucaena leucocephala), Tagasaste (Chamaecytisus proliferous), and Saltbush (Atriplex spp.) accounting for most of this acreage. Shrubs and forbs make up the principal component of the diets of goats throughout Asia, Africa, the Near East, and Latin America.

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