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Animals under desert conditions are suffering from feed shortage and low nutritive value of available feedstuffs. Many desert fodder plants are characterized by its high content of anti-nutritional factors like Tannins which can be detrimental to animals, so using several deactivating materials might be favorable in animal feeding under desert conditions.comparison between Polyethylene glycol (PEG) and Bentonite (as tannins deactivating materials) were discussed and their effects on rumen gas production, feed intake, digestibility, carcass quality and histological changes in animals (sheep)...

Solubility of minerals is the primary factor for their absorption and utilization in animals body. It is a complicated process affected by many factors like type of mineral, localization of minerals in plant cell, degree of solubility in water, rumen fluid pH, concentration of the minerals in the rumen, type and quality of roughage and roughage to concentrate (R/C) ratios in diets incubation period. This book will be useful for animal nutritionist and animal and veterinary science students.