Wijitphan, S., Lorwilai, P., & Arkaseang, C. (2009). Effects of Plant Spacing on Yields and Nutritive Values of Napier Grass (Pennisetum purpureum Schum.) Under Intensive Management of Nitrogen Fertilizer and Irrigation. Pakistan Journal of Nutrition, 8(8), 1240–1243. https://doi.org/10.3923/pjn.2009.1240.1243