was a possible base yield in rainfed condition without nitrogen fertilizer application. However, nitrogen fertilizer should be dividedly applied after each harvest time as under common production practice in order to improve efficiency of fertilizer application. The produced biomass from the experimental practice must be qualified to serve required properties for biogas production systems. In addition, cost efficiency for irrigation system, fertilizer application and labor should be evaluated for reasonable investments and energy inputs required should be assessed in order to assess the environmental friendliness of this supposed Green Energy.