The experiment was carried out during the rabi season from December 2019 to April 2020 in the net house of Soil Science Division, BARI, Joydebpur, Gazipur. Seeds of groundnut (BARI Chinabadam-8) were collected from RARS, Jamalpur. The silted (sandy clay loam) soils were collected from the bank of Turag river at Kodda, Gazipur mixed with cowdung at 5:1 ratio and was used as the potting media. Each pot (28 cm in diameter and 23 cm in height) was filled with approximately 8-kg soil leaving upper 3 inches of pot was vacant to facilitate watering. The pH of cowdung was 6.7 and the nutrient contents were: organic matter 14.1%, N 0.8%, P 1.26%, K 0.88%, Ca 1.55%, Mg 0.82%, S 0.62%, Fe 0.25% and Mn 0.112%. The soil contained 14 AM (100-1 g soil) spores of indigenous mixed AM fungal species and the experiment was conducted under unsterilized soil conditions. Soil pH was measured by a combined glass calomel electrode (Jackson, 1958). Organic carbon was determined by the Wet Oxidation Method. Total N was determined by the modified Kjeldahl method. Calcium, K and Mg were determined by NH4OAc extraction method (Black, 1965). Copper, Fe, Mn and Zn were determined by DTPA extraction followed by AAS reading. Boron was determined by the CaCl2 extraction method. Phosphorus was determined by the Modified Olsen method (Neutral + Calcareous soils) according to Olsen et al. (1954). Sulphur was determined by CaH4(PO4)2.H2O extraction followed by turbidimetric turbidity method with BaCl2. Chemical fertilizers were applied as a soil test basis according to the method described in the fertilizer recommendation guide (BARC, 2018). Half of N and all of P, K, S, Mg, Zn, B and Mo applied as basal during final land preparation and the remaining N applied as a top dressing at the flowering stage. Different concentrations of salinity were prepared according to New South Walles (NSW) Department of Primary Industries 2005, Australia and applied three times during the experimentation period. Firstly, applied before sowing of groundnut seed, next after 25 DAS and then after 35 DAS. The arbuscular mycorrhizal inoculum was prepared from the roots and rhizosphere soils of Sorghum. Mycorrhizal species was originally isolated from different AEZ region, using the wet sieving and decanting method. The spores were left to multiply for 6 months on sorghum plants using unsterilized soil, collected from the same site, in the net house of Soil Science Division, BARI. Plants were irrigated with tap water as needed. A mixture of infected sorghum root and soil which contained spores was used as mycorrhizal inoculum. The soil-based AM fungal inoculum containing 150 g of rhizosphere soil (approximate 252 ± 20 spores/100 g soil) and infected sorghum root fragments with a minimum colonization level was inoculated to each mycorrhizal pot. The mycorrhizal inoculum was first placed in each pot at 3-5 cm depth and was covered with a thin soil layer of 1 cm immediately prior to the seed sowing of groundnut to facilitate fungal colonization of plant roots. The experiment was designed in factorial RCBD with ten treatments combination and four replications. Ten seeds were sown in each pot at 1 cm soil depth. After collecting germination percentage data the treatment was sustained with 4 vigorous seedlings in mycorrhizal and non-mycorrhizal pot, and the other seedlings were removed from the pot. The ten (10) treatment combinations were: T1: 0 dsm-1, T2: 0 dsm-1 + AM, T3: 2 dsm-1 , T4: 2 dsm-1 + AM, T5: 4 dsm-1 , T6: 4 dsm-1 + AM, T7: 6 dsm-1, T8: 6 dsm-1 + AM, T9: 8 dsm-1 and T10: 8 dsm-1 + AM. The germination test was carried out according to ISTA rules (ISTA, 1976). For each treatment, 25 seeds were put into Petri dishes. The Petri dishes were put on a laboratory table at room temperature (25 ± 2oC). After 3 days, normal, abnormal and diseased seeds were counted. Germination of groundnut seed in the laboratory table was 90%. Fifteen seeds were sown in each pot. After 10, 13, 16, 19- and 22-days germinated seeds were observed and counted. Germination percentage was obtained as the number of germinated seed in each pot divided by a total number of seed sown in each pot and multiplied this value by 100. Groundnuts were harvested after maturity and yield parameters were measured. Assessment of spore population was done following the Wet Sieving and Decanting Method. All the AM spores were isolated from the extract with the help of fine forceps into a watch glass with a small quantity of water. The extract, with AM spores, was observed under the stereomicroscope and the number of spores was counted. Spore numbers from the three replicates per sample were averaged and the result was expressed as a number per 100 g of dry soil basis. The percentage of AM colonization was estimated by the root slide technique (Read et al., 1976). A root segment was considered as positively infected if it showed mycelium, vesicles and arbuscules or any other combination of these structural characteristics of AM colonization. The presence or absence of colonization in the root pieces was recorded and the percent colonization was calculated as dividing the number of AM positive segments by the total number of segments scored and multiplied this value by 100. Data were statistically analyzed using Analysis of Variance (ANOVA) following Statistix 10 package.