Adaptability of some species of halophyte to strongly salt affected soil in Northeast Thailand   Arunee Yuvaniyama and Somsri Arunin   ABSTRACT       Three species of halophytic grasses: Dixie (Sporobolus virginicus, coarse form), Smyrna (Sporobolus virginicus, smooth form), Spartina patens, and Distichlis spicata were planted under strongly salt affected soil of Ki soil series at Ban Pan Dung, Khamthalae Soa district, Nakhon Rachasima province and Ud soil series at Ban Kheng, Muang district, Mahasarakam province form July1989-September1991. The experimental design was RCB with 4 replications. The soil samples were analyzed, the electrical conductivity of the soil of both sites at the planting period on August, 1990 were approximately 20 and 23 dS/m and the soil pH were 8.0 and 9.5, respectively. The results showed that S. virginicus both varieties of coarse and smooth forms in both locations could survive with very vigorous growth and normal tillering. S. patens and D. spicata could survive with some reduction in tillering and rolled leaves at Mahasarakam site but died at Nakhon Ratchasima site at 8 months after transplanting. Because in dry season on April 1991, the ECe of the Nakhon Ratchasima site was increased to more than 100 dS/m while the ECe of the Mahasarakam site was 42 dS/m. Plant analysis showed higher Na/K ratios of Sporobolus varieties than other species at both locations.       Keywords: halophytic grasses, strongly salt affected soil