Sentence:  <WSD>Vetiver</WSD> barriers are planted in 0.50–1m wide strips to minimize the land area under the barrier. <WSD>Vetiver</WSD> grass is the only species that is effective for controlling soil erosion on steep terrains (30 and 60% slope). <WSD>Vetiver</WSD> strips are also used as windbreaks. 
Meaning of the word marked with <WSD> tags:  The grass "Chrysopogon zizanioides" ( <= (noshow=1)), which is native to India, but planted throughout the tropics for its fragrant roots and for erosion control.