The Dust Bowl was the result of a series of dry years (drought) in the 1930s 1 point where millions of pounds of topsoil were desiccated and blown from the
Great Plains and deposited hundreds of miles away. What most likely
contributed to the loss of fertile soil during the Dust Bowl and the years
that immediately followed that event? *
Contour plowing
Absence of native grasses
Perennial crop ground cover
No till agricultural practices

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla