Raul Ramon Vera-Infanzon

INTRODUCTIONThe Eastern Plains of Colombia include 17 million ha of well-drained neotropical savannas, 3.5 million of which have low slopes and can be cultivated, while 6.4 million are hilly, dissecting landscapes resting over soils of variable, but generally superficial soils, except in small valleys that are occasionally sown with introduced pastures (Sánchez and Cochrane 1985). Although ...