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Aims: The application of a huge number of chemical fertilizers for crop production alters the sustainability of the environment and creates pollution. This problem can be minimized by the application of Plant Growth Promoting Bacteria (PGPB). Plant Growth Promoting Bacteria (PGPB) are beneficial bacteria that promote plant growth and development through a variety of mechanisms. Therefore, a pot experiment was conducted at the department of Soil Science, BSMRAU to investigate the effect of different PGPB isolates on growth, nutrient content, and uptake by rice. Materials and Methods: The experiment was carried out following a completely randomized design (CRD) with four replicates. Twenty bacterial isolates were used as treatments with a control treatment. Thirty-five days old seedlings of rice were inoculated with different bacterial isolates for thirty minutes and planted in a plastic pot. Broth culture was applied at one-month intervals and crops were harvested 65 days after planting. Results: Experimental results disclose that application of PGPB isolates resulted in a significant increase in plant height, SPAD value, root length, root volume, straw fresh weight, straw dry weight, root fresh weight, root dry weight, nutrient content and uptake by the rice plant compare to control. The highest values of most of the parameters were recorded from the plant inoculated with the isolate BU Ls 28. Conclusion: The present study suggests that the use of PGPB isolate BU Ls 28 might be used as a suitable inoculant for rice production due to the ability of this isolate to promote plant growth.

The field experiment was conducted in the Charlands of Bangladesh during November 2021 to March 2022 to find the crop production and soil properties status. A randomized complete block design was followed with six treatments and three replications. The organic amendments were quick compost, standard organic fertilizers, poultry manure and biochar @ 3t/ha. A positive change was found for the application of manures compared to control plot with the crop production and soil fertility status from our experimental findings. The yield per plant of pumpkin was ranged from 27.24 to 85.61 kg and BCR 1.06 to 3.40. The fresh tuber yield of sweet potato was varied from 39.29 to 94.00 t/ha and BCR 1.20 to 3.54. Soil pH was varying from 6.74 to 7.36, OC from 0.69 to 1.82%, total N from 0.074 to 0.145%, available P from 7.49 to 17.66mg/kg, available S from 9.55 to 17.81mg/kg and Zn from 0.536 to 1.134mg/kg. Biochar treated plot showed the best result compered to others. Organic amendments should be recommended in the farmer’s field for better crop production and soil fertility status.

The experiment was conducted at the farmer’s fields of three Charlands in Bangladesh during November 2019 to July 2020 for establishing new technologies for enhancement of productivity through innovative soil management practices. The experiments were established in a randomized complete block design using six treatments and three replications. Treatments of the experiments were T1 = FP (Farmers’ Practice) (Control), T2 = RF (Recommended Fertilizer) + Vermicompost (3t/ha), T3 = RF (Recommended Fertilizer) + Quick Compost (3t/ha), T4 = RF (Recommended Fertilizer) + Standard Organic Fertilizers (3t/ha), T5 = RF (Recommended Fertilizer) + Poultry Manure (3t/ha) and T6 = RF (Recommended Fertilizer) + Biochar (3t/ha). The soil status in all selected Charlands were very low to optimum. Results of the experiment showed that application of organic fertilizers along with inorganic fertilizers produced significant (p