and Suggestions
This experiment demonstrated the effect of nitrogen application rates and irrigation treatment; especially, the combination of those to biomass production of Napier grass during the dry season at Chiang Mai province. For three time harvests, applying 0.5 x ET0 and 240 kg N.ha-1, statistically sufficient for achieving productive total dry matter yield of Napier grass, were around 8,200 kg DM.ha-1. Applying 0.1 x ET0 and 300 kg N.ha-1 could potentially reach dry matter yield up to 12,000 kg DM.ha-1. Oppositely, 2,200 kg DM.ha-1