Somphob Jongruaysup และ Damri Thavornmas; Udom Rattanarak. (2002) Comparative Study of Fertilizer Requirement for Three Sugarcane Cultivars Grown on Sandy Loam Soil in Sra Kaew Province. <i>Thai Agricultural Research Journal</i>, <i>20</i>(2), 144-154.Somphob Jongruaysup และ Damri Thavornmas; Udom Rattanarak. "Comparative Study of Fertilizer Requirement for Three Sugarcane Cultivars Grown on Sandy Loam Soil in Sra Kaew Province". Thai Agricultural Research Journal 20 (2002):144-154.Somphob Jongruaysup และ Damri Thavornmas; Udom Rattanarak. Comparative Study of Fertilizer Requirement for Three Sugarcane Cultivars Grown on Sandy Loam Soil in Sra Kaew Province. Department of Agriculture:ม.ป.ท. 2002.