 For "Micanthus x giganteus" specifically, there are no scientific trials available yet regarding yields in the tropics, but other elephant grass types (different napier variants) have been shown to yield up to 80 tonnes per hectare, and commercial napier grass developers advertise yields of around 100 dry tonnes per hectare per year, provided there is an adequate amount of rain or irrigation available (100 mm per month).Felten et al.found a mean winter/spring yield of during a 16-year trial on arable land in Germany.