I didn't know which other picture of plants to show you. Here is a living barrier in Haiti in the border area. The grass like plant you see is sugar  cane, and the white and brown  stem you see in  the foreground is eucalyptus. There are several  trees  planted along  the barrier.  An  earth barrier is  dug along the contour  using  an implement called  an A-frame (which maybe I'll describe in another installment), and then a  grass or sugar  cane is planted along the contour. Trees are planted on a wider spacing to help reinforce the barrier, and provide additional products  and organic  matter. The barrier helps  retain soil  in the field, while at the same time improving the  quality  of the soil, and providing multiple products beyond just the standard beans  and corn. So  it's a win-win situation. One  of  the small but important details  in this case,  is that sugar cane is considered  people food, so people are less  likely  to allow their  animals to graze  on a living barrier, thus keeping it from being destroyed. Sugar cane can also be used as animal forage,  but little details like that can make the difference between a field successfully being protected and not.