sentences:  Because of its extremely high rate of development, "Eichhornia crassipes" is an excellent source of biomass.of standing crop thus produces more than of biogas (70% , 30% ).According to Curtis and Duke, of dry matter can yield of biogas, giving a heating value of compared to pure methane (895 Btu/ft3)
  
  Wolverton and McDonald report approximately methane, indicating biomass requirements of to attain the yield projected by the National Academy of Sciences (Washington).