Sustainable agriculture integrates three main goals, environmental health, economic profitability, and social and economic equity. These goals have been defined by a variety of philosophies, policies and practices, from the vision of farmers and consumers. Perspectives and approaches are very diverse, the following topics intend to to help understanding what sustainable agriculture is.
... real. (Geometrically, this means that the parabola described by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then there ...