Navigation Instructions: Tab across principal categories, use down arrow to open sub-menu of a main category, and use up arrow to close sub-menu of a major category. Navigation Instructions: Tab across most important categories, use down arrow to open sub-menu of a main category, and dissipate arrow to close sub-menu https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=9015245