Pantu, M. ., Kaewsuralikhit, S. ., Sanoh, S. ., Dhanaraks, K. ., Prasertsak , P. ., Thongsodsaeng , C., Duangwichian, C. ., & Champathong, K. . (2016). Effect of using Azolla (Azolla microphylla) in Combination with Nitrogen Fertilizer on Growth and Nutrient Content in Leaf of Oil Palm.      . Thai Agricultural Research Journal, 34(3), 286–298. https://doi.org/10.14456/thaidoa-agres.2016.18