Functions and deficiency of Manganese and molybednum Mechanism of nutrient absorption Functions and deficiency of Iron, boron and zinc Functions and deficiency of Magnesium Criteria for nutrient essentiality Functions of Carbon, Hydrogen and Oxygen Functions and deficiency symptoms of copper and chlorine in plants Ruminant Production( cattle production) Ruminant Production( common vices) Ruminant Production( Body conformation) 
